diff --git a/src/api/endpoints/aggregation/posts.ts b/src/api/endpoints/aggregation/posts.ts
index 48ee225129be32aa712decd2cc282ca262ef8907..9d8bccbdb2d12c6a37f449eeb6e40e7a9b9a6e84 100644
--- a/src/api/endpoints/aggregation/posts.ts
+++ b/src/api/endpoints/aggregation/posts.ts
@@ -19,7 +19,7 @@ module.exports = params => new Promise(async (res, rej) => {
 		.aggregate([
 			{ $project: {
 				repost_id: '$repost_id',
-				reply_to_id: '$reply_to_id',
+				reply_id: '$reply_id',
 				created_at: { $add: ['$created_at', 9 * 60 * 60 * 1000] } // Convert into JST
 			}},
 			{ $project: {
@@ -34,7 +34,7 @@ module.exports = params => new Promise(async (res, rej) => {
 						then: 'repost',
 						else: {
 							$cond: {
-								if: { $ne: ['$reply_to_id', null] },
+								if: { $ne: ['$reply_id', null] },
 								then: 'reply',
 								else: 'post'
 							}
diff --git a/src/api/endpoints/aggregation/posts/reply.ts b/src/api/endpoints/aggregation/posts/reply.ts
index 02a60c8969aeb8425576097ddf237bade98600b9..b114c34e1ee4064f67b0d14294a6dd9ce7644bde 100644
--- a/src/api/endpoints/aggregation/posts/reply.ts
+++ b/src/api/endpoints/aggregation/posts/reply.ts
@@ -26,7 +26,7 @@ module.exports = (params) => new Promise(async (res, rej) => {
 
 	const datas = await Post
 		.aggregate([
-			{ $match: { reply_to: post._id } },
+			{ $match: { reply: post._id } },
 			{ $project: {
 				created_at: { $add: ['$created_at', 9 * 60 * 60 * 1000] } // Convert into JST
 			}},
diff --git a/src/api/endpoints/aggregation/users/activity.ts b/src/api/endpoints/aggregation/users/activity.ts
index 5a3e78c44178268fa694795cbc54cfd078c3cea7..102a71d7cbb0af4367091ac5021e07c8c163b4af 100644
--- a/src/api/endpoints/aggregation/users/activity.ts
+++ b/src/api/endpoints/aggregation/users/activity.ts
@@ -40,7 +40,7 @@ module.exports = (params) => new Promise(async (res, rej) => {
 			{ $match: { user_id: user._id } },
 			{ $project: {
 				repost_id: '$repost_id',
-				reply_to_id: '$reply_to_id',
+				reply_id: '$reply_id',
 				created_at: { $add: ['$created_at', 9 * 60 * 60 * 1000] } // Convert into JST
 			}},
 			{ $project: {
@@ -55,7 +55,7 @@ module.exports = (params) => new Promise(async (res, rej) => {
 						then: 'repost',
 						else: {
 							$cond: {
-								if: { $ne: ['$reply_to_id', null] },
+								if: { $ne: ['$reply_id', null] },
 								then: 'reply',
 								else: 'post'
 							}
diff --git a/src/api/endpoints/aggregation/users/post.ts b/src/api/endpoints/aggregation/users/post.ts
index c964815a0c3a25d29fac8e15d6c5ba450671d78e..c6a75eee394f2315ccfee06ba61cebeb5682a149 100644
--- a/src/api/endpoints/aggregation/users/post.ts
+++ b/src/api/endpoints/aggregation/users/post.ts
@@ -34,7 +34,7 @@ module.exports = (params) => new Promise(async (res, rej) => {
 			{ $match: { user_id: user._id } },
 			{ $project: {
 				repost_id: '$repost_id',
-				reply_to_id: '$reply_to_id',
+				reply_id: '$reply_id',
 				created_at: { $add: ['$created_at', 9 * 60 * 60 * 1000] } // Convert into JST
 			}},
 			{ $project: {
@@ -49,7 +49,7 @@ module.exports = (params) => new Promise(async (res, rej) => {
 						then: 'repost',
 						else: {
 							$cond: {
-								if: { $ne: ['$reply_to_id', null] },
+								if: { $ne: ['$reply_id', null] },
 								then: 'reply',
 								else: 'post'
 							}
diff --git a/src/api/endpoints/posts.ts b/src/api/endpoints/posts.ts
index 23b9bd0b664211063d79ead5df732a29690a63e8..f6efcc108d582c90e7bd512ee33677bdb160c90f 100644
--- a/src/api/endpoints/posts.ts
+++ b/src/api/endpoints/posts.ts
@@ -62,7 +62,7 @@ module.exports = (params) => new Promise(async (res, rej) => {
 	}
 
 	if (reply != undefined) {
-		query.reply_to_id = reply ? { $exists: true, $ne: null } : null;
+		query.reply_id = reply ? { $exists: true, $ne: null } : null;
 	}
 
 	if (repost != undefined) {
diff --git a/src/api/endpoints/posts/context.ts b/src/api/endpoints/posts/context.ts
index cd5f15f48159a4e77dfeb52e2767f7cb228bda21..bad59a6beed61bd15b56500b69cdebf5a1dab72d 100644
--- a/src/api/endpoints/posts/context.ts
+++ b/src/api/endpoints/posts/context.ts
@@ -49,13 +49,13 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 			return;
 		}
 
-		if (p.reply_to_id) {
-			await get(p.reply_to_id);
+		if (p.reply_id) {
+			await get(p.reply_id);
 		}
 	}
 
-	if (post.reply_to_id) {
-		await get(post.reply_to_id);
+	if (post.reply_id) {
+		await get(post.reply_id);
 	}
 
 	// Serialize
diff --git a/src/api/endpoints/posts/create.ts b/src/api/endpoints/posts/create.ts
index 2bb1a7af17adf1957301e8b966e0aa92a386620d..3b9e0d89972c6927376e9acdf13e5c77901c5441 100644
--- a/src/api/endpoints/posts/create.ts
+++ b/src/api/endpoints/posts/create.ts
@@ -103,9 +103,9 @@ module.exports = (params, user: IUser, app) => new Promise(async (res, rej) => {
 		}
 	}
 
-	// Get 'in_reply_to_post_id' parameter
-	const [inReplyToPostId, inReplyToPostIdErr] = $(params.reply_to_id).optional.id().$;
-	if (inReplyToPostIdErr) return rej('invalid in_reply_to_post_id');
+	// Get 'in_reply_post_id' parameter
+	const [inReplyToPostId, inReplyToPostIdErr] = $(params.reply_id).optional.id().$;
+	if (inReplyToPostIdErr) return rej('invalid in_reply_post_id');
 
 	let inReplyToPost: IPost = null;
 	if (inReplyToPostId !== undefined) {
@@ -192,7 +192,7 @@ module.exports = (params, user: IUser, app) => new Promise(async (res, rej) => {
 	if (user.latest_post) {
 		if (deepEqual({
 			text: user.latest_post.text,
-			reply: user.latest_post.reply_to_id ? user.latest_post.reply_to_id.toString() : null,
+			reply: user.latest_post.reply_id ? user.latest_post.reply_id.toString() : null,
 			repost: user.latest_post.repost_id ? user.latest_post.repost_id.toString() : null,
 			media_ids: (user.latest_post.media_ids || []).map(id => id.toString())
 		}, {
@@ -211,7 +211,7 @@ module.exports = (params, user: IUser, app) => new Promise(async (res, rej) => {
 		channel_id: channel ? channel._id : undefined,
 		index: channel ? channel.index + 1 : undefined,
 		media_ids: files ? files.map(file => file._id) : undefined,
-		reply_to_id: inReplyToPost ? inReplyToPost._id : undefined,
+		reply_id: inReplyToPost ? inReplyToPost._id : undefined,
 		repost_id: repost ? repost._id : undefined,
 		poll: poll,
 		text: text,
diff --git a/src/api/endpoints/posts/replies.ts b/src/api/endpoints/posts/replies.ts
index 89f4d998414744f513e82b01ec9588fba47b1d5d..3fd6a467692c5009a61faa515689cd1d347033b2 100644
--- a/src/api/endpoints/posts/replies.ts
+++ b/src/api/endpoints/posts/replies.ts
@@ -40,7 +40,7 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 
 	// Issue query
 	const replies = await Post
-		.find({ reply_to_id: post._id }, {
+		.find({ reply_id: post._id }, {
 			limit: limit,
 			skip: offset,
 			sort: {
diff --git a/src/api/endpoints/posts/trend.ts b/src/api/endpoints/posts/trend.ts
index 3277206d2698d721b053a8492f6397c907341954..64a195dff1db4c7a665a814c1e787be9c4ffa06f 100644
--- a/src/api/endpoints/posts/trend.ts
+++ b/src/api/endpoints/posts/trend.ts
@@ -48,7 +48,7 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 	} as any;
 
 	if (reply != undefined) {
-		query.reply_to_id = reply ? { $exists: true, $ne: null } : null;
+		query.reply_id = reply ? { $exists: true, $ne: null } : null;
 	}
 
 	if (repost != undefined) {
diff --git a/src/api/endpoints/users/get_frequently_replied_users.ts b/src/api/endpoints/users/get_frequently_replied_users.ts
index 2e0e2e40a7a0177e7ff391336b8c1f775771ec2a..bb0f3b4ceac2898cdcba1f58a47bfd23fd6d6f6d 100644
--- a/src/api/endpoints/users/get_frequently_replied_users.ts
+++ b/src/api/endpoints/users/get_frequently_replied_users.ts
@@ -27,7 +27,7 @@ module.exports = (params, me) => new Promise(async (res, rej) => {
 	// Fetch recent posts
 	const recentPosts = await Post.find({
 		user_id: user._id,
-		reply_to_id: {
+		reply_id: {
 			$exists: true,
 			$ne: null
 		}
@@ -38,7 +38,7 @@ module.exports = (params, me) => new Promise(async (res, rej) => {
 		limit: 1000,
 		fields: {
 			_id: false,
-			reply_to_id: true
+			reply_id: true
 		}
 	});
 
@@ -49,7 +49,7 @@ module.exports = (params, me) => new Promise(async (res, rej) => {
 
 	const replyTargetPosts = await Post.find({
 		_id: {
-			$in: recentPosts.map(p => p.reply_to_id)
+			$in: recentPosts.map(p => p.reply_id)
 		},
 		user_id: {
 			$ne: user._id
diff --git a/src/api/endpoints/users/posts.ts b/src/api/endpoints/users/posts.ts
index e37b6607734d9aec7b09ac6ce817c11787a89300..d8204b8b80e4a054579e8560ab7a763378018c65 100644
--- a/src/api/endpoints/users/posts.ts
+++ b/src/api/endpoints/users/posts.ts
@@ -85,7 +85,7 @@ module.exports = (params, me) => new Promise(async (res, rej) => {
 	}
 
 	if (!includeReplies) {
-		query.reply_to_id = null;
+		query.reply_id = null;
 	}
 
 	if (withMedia) {
diff --git a/src/api/models/post.ts b/src/api/models/post.ts
index fe07dcb0b13822b2f27e1b6876d455fc57914343..7584ce182d8238c4d6c15c9a3e76fa4f6d2f1726 100644
--- a/src/api/models/post.ts
+++ b/src/api/models/post.ts
@@ -13,7 +13,7 @@ export type IPost = {
 	channel_id: mongo.ObjectID;
 	created_at: Date;
 	media_ids: mongo.ObjectID[];
-	reply_to_id: mongo.ObjectID;
+	reply_id: mongo.ObjectID;
 	repost_id: mongo.ObjectID;
 	poll: {}; // todo
 	text: string;
diff --git a/src/api/serializers/post.ts b/src/api/serializers/post.ts
index 7d40df2d6aec78a60f4267d2e81108c50f050059..7c3690ef797738c235a1598b650825e20ef40443 100644
--- a/src/api/serializers/post.ts
+++ b/src/api/serializers/post.ts
@@ -123,9 +123,9 @@ const self = (
 		});
 		_post.next = next ? next._id : null;
 
-		if (_post.reply_to_id) {
+		if (_post.reply_id) {
 			// Populate reply to post
-			_post.reply_to = await self(_post.reply_to_id, meId, {
+			_post.reply = await self(_post.reply_id, meId, {
 				detail: false
 			});
 		}
diff --git a/src/common/get-post-summary.ts b/src/common/get-post-summary.ts
index ac15077b2812739eec88b92039af8e3b64f50672..6e8f65708e80d04e1d1e30f290c9dbd459b98e49 100644
--- a/src/common/get-post-summary.ts
+++ b/src/common/get-post-summary.ts
@@ -22,9 +22,9 @@ const summarize = (post: any): string => {
 	}
 
 	// 返信のとき
-	if (post.reply_to_id) {
-		if (post.reply_to) {
-			summary += ` RE: ${summarize(post.reply_to)}`;
+	if (post.reply_id) {
+		if (post.reply) {
+			summary += ` RE: ${summarize(post.reply)}`;
 		} else {
 			summary += ' RE: ...';
 		}
diff --git a/src/docs/api/entities/post.pug b/src/docs/api/entities/post.pug
index e505d3fcb6a0dc3c1bfee68d520f9298b2b23437..954f1727174baf5be146d44b9806e1fb27e64203 100644
--- a/src/docs/api/entities/post.pug
+++ b/src/docs/api/entities/post.pug
@@ -52,11 +52,11 @@ block content
 					td Number
 					td 返信数
 				tr.optional
-					td reply_to
+					td reply
 					td: a(href='./post', target='_blank') Post
 					td 返信先の投稿
 				tr.nullable
-					td reply_to_id
+					td reply_id
 					td ID
 					td 返信先の投稿のID
 				tr.optional
@@ -90,7 +90,7 @@ block content
 			{
 				"created_at": "2016-12-10T00:28:50.114Z",
 				"media_ids": null,
-				"reply_to_id": "584a16b15860fc52320137e3",
+				"reply_id": "584a16b15860fc52320137e3",
 				"repost_id": null,
 				"text": "小日向美穂だぞ!",
 				"user_id": "5848bf7764e572683f4402f8",
@@ -117,10 +117,10 @@ block content
 					"is_following": true,
 					"is_followed": true
 				},
-				"reply_to": {
+				"reply": {
 					"created_at": "2016-12-09T02:28:01.563Z",
 					"media_ids": null,
-					"reply_to_id": "5849d35e547e4249be329884",
+					"reply_id": "5849d35e547e4249be329884",
 					"repost_id": null,
 					"text": "アイコン小日向美穂?",
 					"user_id": "57d01a501fdf2d07be417afe",
diff --git a/src/web/app/ch/tags/channel.tag b/src/web/app/ch/tags/channel.tag
index 8657652fb082c08141df5504a78d6ed2415de380..f1eea6b9bcfff17bdcf6b76f3d1e5bef80303e64 100644
--- a/src/web/app/ch/tags/channel.tag
+++ b/src/web/app/ch/tags/channel.tag
@@ -96,7 +96,7 @@
 		<span>ID:<i>{ post.user.username }</i></span>
 	</header>
 	<div>
-		<a if={ post.reply_to }>&gt;&gt;{ post.reply_to.index }</a>
+		<a if={ post.reply }>&gt;&gt;{ post.reply.index }</a>
 		{ post.text }
 		<div class="media" if={ post.media }>
 			<virtual each={ file in post.media }>
@@ -208,7 +208,7 @@
 			this.api('posts/create', {
 				text: this.refs.text.value == '' ? undefined : this.refs.text.value,
 				media_ids: files,
-				reply_to_id: this.reply ? this.reply.id : undefined,
+				reply_id: this.reply ? this.reply.id : undefined,
 				channel_id: this.channel.id
 			}).then(data => {
 				this.clear();
diff --git a/src/web/app/desktop/tags/post-detail.tag b/src/web/app/desktop/tags/post-detail.tag
index 58343482d06d387099406c7ed8503b48699df1dc..ce7f81e32c6e4aa1205c618e0bd710248f8ec70b 100644
--- a/src/web/app/desktop/tags/post-detail.tag
+++ b/src/web/app/desktop/tags/post-detail.tag
@@ -1,6 +1,6 @@
 <mk-post-detail title={ title }>
 	<div class="main">
-		<button class="read-more" if={ p.reply_to && p.reply_to.reply_to_id && context == null } title="会話をもっと読み込む" onclick={ loadContext } disabled={ contextFetching }>
+		<button class="read-more" if={ p.reply && p.reply.reply_id && context == null } title="会話をもっと読み込む" onclick={ loadContext } disabled={ contextFetching }>
 			<i class="fa fa-ellipsis-v" if={ !contextFetching }></i>
 			<i class="fa fa-spinner fa-pulse" if={ contextFetching }></i>
 		</button>
@@ -9,8 +9,8 @@
 				<mk-post-detail-sub post={ post }/>
 			</virtual>
 		</div>
-		<div class="reply-to" if={ p.reply_to }>
-			<mk-post-detail-sub post={ p.reply_to }/>
+		<div class="reply-to" if={ p.reply }>
+			<mk-post-detail-sub post={ p.reply }/>
 		</div>
 		<div class="repost" if={ isRepost }>
 			<p>
@@ -329,7 +329,7 @@
 
 			// Fetch context
 			this.api('posts/context', {
-				post_id: this.p.reply_to_id
+				post_id: this.p.reply_id
 			}).then(context => {
 				this.update({
 					contextFetching: false,
diff --git a/src/web/app/desktop/tags/post-form.tag b/src/web/app/desktop/tags/post-form.tag
index 6a363d67cd7e3a6494486760ade6cdaad8b2a567..5041078beec19fe621571de492df531369003a5e 100644
--- a/src/web/app/desktop/tags/post-form.tag
+++ b/src/web/app/desktop/tags/post-form.tag
@@ -475,7 +475,7 @@
 			this.api('posts/create', {
 				text: this.refs.text.value == '' ? undefined : this.refs.text.value,
 				media_ids: files,
-				reply_to_id: this.inReplyToPost ? this.inReplyToPost.id : undefined,
+				reply_id: this.inReplyToPost ? this.inReplyToPost.id : undefined,
 				repost_id: this.repost ? this.repost.id : undefined,
 				poll: this.poll ? this.refs.poll.get() : undefined
 			}).then(data => {
diff --git a/src/web/app/desktop/tags/sub-post-content.tag b/src/web/app/desktop/tags/sub-post-content.tag
index 02cb5251b259d125fb4531ba2b2818b80b416cf2..c75ae2911ceba9074906b799d77225dbdaab62ba 100644
--- a/src/web/app/desktop/tags/sub-post-content.tag
+++ b/src/web/app/desktop/tags/sub-post-content.tag
@@ -1,6 +1,6 @@
 <mk-sub-post-content>
 	<div class="body">
-		<a class="reply" if={ post.reply_to_id }>
+		<a class="reply" if={ post.reply_id }>
 			<i class="fa fa-reply"></i>
 		</a>
 		<span ref="text"></span>
diff --git a/src/web/app/desktop/tags/timeline.tag b/src/web/app/desktop/tags/timeline.tag
index 64b64f902fab6ec499150cccbdfb5e6faab3a2ca..44f3d5d8ec955c674c10be4a17190b32e96f499f 100644
--- a/src/web/app/desktop/tags/timeline.tag
+++ b/src/web/app/desktop/tags/timeline.tag
@@ -82,8 +82,8 @@
 </mk-timeline>
 
 <mk-timeline-post tabindex="-1" title={ title } onkeydown={ onKeyDown } dblclick={ onDblClick }>
-	<div class="reply-to" if={ p.reply_to }>
-		<mk-timeline-post-sub post={ p.reply_to }/>
+	<div class="reply-to" if={ p.reply }>
+		<mk-timeline-post-sub post={ p.reply }/>
 	</div>
 	<div class="repost" if={ isRepost }>
 		<p>
@@ -113,7 +113,7 @@
 			<div class="body">
 				<div class="text" ref="text">
 					<p class="channel" if={ p.channel != null }><a href={ CONFIG.chUrl + '/' + p.channel.id } target="_blank">{ p.channel.title }</a>:</p>
-					<a class="reply" if={ p.reply_to }>
+					<a class="reply" if={ p.reply }>
 						<i class="fa fa-reply"></i>
 					</a>
 					<p class="dummy"></p>
diff --git a/src/web/app/mobile/tags/post-detail.tag b/src/web/app/mobile/tags/post-detail.tag
index ed275749ecceeff34874005561e52ae68e9c1234..8a32101036b17248098c704f627c9a17f2588167 100644
--- a/src/web/app/mobile/tags/post-detail.tag
+++ b/src/web/app/mobile/tags/post-detail.tag
@@ -1,5 +1,5 @@
 <mk-post-detail>
-	<button class="read-more" if={ p.reply_to && p.reply_to.reply_to_id && context == null } onclick={ loadContext } disabled={ loadingContext }>
+	<button class="read-more" if={ p.reply && p.reply.reply_id && context == null } onclick={ loadContext } disabled={ loadingContext }>
 		<i class="fa fa-ellipsis-v" if={ !contextFetching }></i>
 		<i class="fa fa-spinner fa-pulse" if={ contextFetching }></i>
 	</button>
@@ -8,8 +8,8 @@
 			<mk-post-detail-sub post={ post }/>
 		</virtual>
 	</div>
-	<div class="reply-to" if={ p.reply_to }>
-		<mk-post-detail-sub post={ p.reply_to }/>
+	<div class="reply-to" if={ p.reply }>
+		<mk-post-detail-sub post={ p.reply }/>
 	</div>
 	<div class="repost" if={ isRepost }>
 		<p>
@@ -348,7 +348,7 @@
 
 			// Fetch context
 			this.api('posts/context', {
-				post_id: this.p.reply_to_id
+				post_id: this.p.reply_id
 			}).then(context => {
 				this.update({
 					contextFetching: false,
diff --git a/src/web/app/mobile/tags/post-form.tag b/src/web/app/mobile/tags/post-form.tag
index cf267de94a6267df3f567d097ac524c8fdeab7f7..d7d382c9e2eb704758342d577c000d269abaac68 100644
--- a/src/web/app/mobile/tags/post-form.tag
+++ b/src/web/app/mobile/tags/post-form.tag
@@ -267,7 +267,7 @@
 			this.api('posts/create', {
 				text: this.refs.text.value == '' ? undefined : this.refs.text.value,
 				media_ids: files,
-				reply_to_id: opts.reply ? opts.reply.id : undefined,
+				reply_id: opts.reply ? opts.reply.id : undefined,
 				poll: this.poll ? this.refs.poll.get() : undefined
 			}).then(data => {
 				this.trigger('post');
diff --git a/src/web/app/mobile/tags/sub-post-content.tag b/src/web/app/mobile/tags/sub-post-content.tag
index 97e0ecec03371811324ceda0874b90b10a8ab273..e32e2451856fdb33be0db29cc5775573cfaf0a88 100644
--- a/src/web/app/mobile/tags/sub-post-content.tag
+++ b/src/web/app/mobile/tags/sub-post-content.tag
@@ -1,5 +1,5 @@
 <mk-sub-post-content>
-	<div class="body"><a class="reply" if={ post.reply_to_id }><i class="fa fa-reply"></i></a><span ref="text"></span><a class="quote" if={ post.repost_id } href={ '/post:' + post.repost_id }>RP: ...</a></div>
+	<div class="body"><a class="reply" if={ post.reply_id }><i class="fa fa-reply"></i></a><span ref="text"></span><a class="quote" if={ post.repost_id } href={ '/post:' + post.repost_id }>RP: ...</a></div>
 	<details if={ post.media }>
 		<summary>({ post.media.length }個のメディア)</summary>
 		<mk-images-viewer images={ post.media }/>
diff --git a/src/web/app/mobile/tags/timeline.tag b/src/web/app/mobile/tags/timeline.tag
index ad18521df6c4f03e3f0a25135162dead609aa2ce..f9ec2cca60027c26976a7c181fa8d8b5c8772ff3 100644
--- a/src/web/app/mobile/tags/timeline.tag
+++ b/src/web/app/mobile/tags/timeline.tag
@@ -137,8 +137,8 @@
 </mk-timeline>
 
 <mk-timeline-post class={ repost: isRepost }>
-	<div class="reply-to" if={ p.reply_to }>
-		<mk-timeline-post-sub post={ p.reply_to }/>
+	<div class="reply-to" if={ p.reply }>
+		<mk-timeline-post-sub post={ p.reply }/>
 	</div>
 	<div class="repost" if={ isRepost }>
 		<p>
@@ -165,7 +165,7 @@
 			<div class="body">
 				<div class="text" ref="text">
 					<p class="channel" if={ p.channel != null }><a href={ CONFIG.chUrl + '/' + p.channel.id } target="_blank">{ p.channel.title }</a>:</p>
-					<a class="reply" if={ p.reply_to }>
+					<a class="reply" if={ p.reply }>
 						<i class="fa fa-reply"></i>
 					</a>
 					<p class="dummy"></p>
diff --git a/test/api.js b/test/api.js
index 1e731b554923a7bfd0f3adcf376d6bc96fc13ec3..b43eb7ff6280e52aa77c146d6973fd39beac3ed4 100644
--- a/test/api.js
+++ b/test/api.js
@@ -277,15 +277,15 @@ describe('API', () => {
 			const me = await insertSakurako();
 			const post = {
 				text: 'さく',
-				reply_to_id: himaPost._id.toString()
+				reply_id: himaPost._id.toString()
 			};
 			const res = await request('/posts/create', post, me);
 			res.should.have.status(200);
 			res.body.should.be.a('object');
 			res.body.should.have.property('text').eql(post.text);
-			res.body.should.have.property('reply_to_id').eql(post.reply_to_id);
-			res.body.should.have.property('reply_to');
-			res.body.reply_to.should.have.property('text').eql(himaPost.text);
+			res.body.should.have.property('reply_id').eql(post.reply_id);
+			res.body.should.have.property('reply');
+			res.body.reply.should.have.property('text').eql(himaPost.text);
 		}));
 
 		it('repostできる', async(async () => {
@@ -350,7 +350,7 @@ describe('API', () => {
 			const me = await insertSakurako();
 			const post = {
 				text: 'さく',
-				reply_to_id: '000000000000000000000000'
+				reply_id: '000000000000000000000000'
 			};
 			const res = await request('/posts/create', post, me);
 			res.should.have.status(400);
@@ -369,7 +369,7 @@ describe('API', () => {
 			const me = await insertSakurako();
 			const post = {
 				text: 'さく',
-				reply_to_id: 'kyoppie'
+				reply_id: 'kyoppie'
 			};
 			const res = await request('/posts/create', post, me);
 			res.should.have.status(400);