diff --git a/src/client/app/desktop/views/pages/user/user.vue b/src/client/app/desktop/views/pages/user/user.vue
index 28ccd7807..89dbd41b8 100644
--- a/src/client/app/desktop/views/pages/user/user.vue
+++ b/src/client/app/desktop/views/pages/user/user.vue
@@ -6,7 +6,7 @@
 		<main>
 			<div class="main">
 				<x-header :user="user"/>
-				<mk-note-detail v-if="user.pinnedNote" :note="user.pinnedNote" :compact="true"/>
+				<mk-note-detail v-for="n in user.pinnedNotes" :key="n.id" :note="n" :compact="true"/>
 				<x-timeline class="timeline" ref="tl" :user="user"/>
 			</div>
 			<div class="side">
diff --git a/src/client/app/mobile/views/pages/user/home.vue b/src/client/app/mobile/views/pages/user/home.vue
index 8b57276b1..4118afef1 100644
--- a/src/client/app/mobile/views/pages/user/home.vue
+++ b/src/client/app/mobile/views/pages/user/home.vue
@@ -1,6 +1,6 @@
 <template>
 <div class="root home">
-	<mk-note-detail v-if="user.pinnedNote" :note="user.pinnedNote" :compact="true"/>
+	<mk-note-detail v-for="n in user.pinnedNotes" :key="n.id" :note="n" :compact="true"/>
 	<section class="recent-notes">
 		<h2>%fa:R comments%%i18n:@recent-notes%</h2>
 		<div>
diff --git a/src/docs/api/entities/user.yaml b/src/docs/api/entities/user.yaml
index c90b55ee8..e3755d858 100644
--- a/src/docs/api/entities/user.yaml
+++ b/src/docs/api/entities/user.yaml
@@ -101,15 +101,15 @@ props:
       ja-JP: "投稿の数"
       en-US: "The number of the notes of this user"
 
-  pinnedNote:
-    type: "entity(Note)"
+  pinnedNotes:
+    type: "entity(Note)[]"
     optional: true
     desc:
       ja-JP: "ピン留めされた投稿"
       en-US: "The pinned note of this user"
 
-  pinnedNoteId:
-    type: "id(Note)"
+  pinnedNoteIds:
+    type: "id(Note)[]"
     optional: true
     desc:
       ja-JP: "ピン留めされた投稿のID"
diff --git a/src/models/user.ts b/src/models/user.ts
index 64197c91c..b595fa8d7 100644
--- a/src/models/user.ts
+++ b/src/models/user.ts
@@ -35,6 +35,28 @@ User.createIndex('uri', { sparse: true, unique: true });
 
 export default User;
 
+// 後方互換性のため
+User.findOne({
+	pinnedNoteId: { $exists: true }
+}).then(async x => {
+	if (x == null) return;
+
+	const users = await User.find({
+		pinnedNoteId: { $exists: true }
+	});
+
+	users.forEach(u => {
+		User.update({ _id: u._id }, {
+			$set: {
+				pinnedNoteIds: [(u as any).pinnedNoteId]
+			},
+			$unset: {
+				pinnedNoteId: ''
+			}
+		});
+	});
+});
+
 type IUserBase = {
 	_id: mongo.ObjectID;
 	createdAt: Date;
@@ -53,7 +75,7 @@ type IUserBase = {
 	wallpaperUrl?: string;
 	data: any;
 	description: string;
-	pinnedNoteId: mongo.ObjectID;
+	pinnedNoteIds: mongo.ObjectID[];
 
 	/**
 	 * 凍結されているか否か
@@ -464,11 +486,11 @@ export const pack = (
 	}
 
 	if (opts.detail) {
-		if (_user.pinnedNoteId) {
-			// Populate pinned note
-			_user.pinnedNote = packNote(_user.pinnedNoteId, meId, {
+		if (_user.pinnedNoteIds) {
+			// Populate pinned notes
+			_user.pinnedNotes = Promise.all(_user.pinnedNoteIds.map((id: mongo.ObjectId) => packNote(id, meId, {
 				detail: true
-			});
+			})));
 		}
 
 		if (meId && !meId.equals(_user.id)) {
diff --git a/src/server/api/endpoints/i/pin.ts b/src/server/api/endpoints/i/pin.ts
index ae03a8633..8804d5aa7 100644
--- a/src/server/api/endpoints/i/pin.ts
+++ b/src/server/api/endpoints/i/pin.ts
@@ -21,9 +21,21 @@ export default async (params: any, user: ILocalUser) => new Promise(async (res,
 		return rej('note not found');
 	}
 
+	const pinnedNoteIds = user.pinnedNoteIds || [];
+
+	if (pinnedNoteIds.some(id => id.equals(note._id))) {
+		return rej('already exists');
+	}
+
+	pinnedNoteIds.unshift(note._id);
+
+	if (pinnedNoteIds.length > 5) {
+		pinnedNoteIds.pop();
+	}
+
 	await User.update(user._id, {
 		$set: {
-			pinnedNoteId: note._id
+			pinnedNoteIds: pinnedNoteIds
 		}
 	});