diff --git a/src/models/follow-requests.ts b/src/models/follow-requests.ts
new file mode 100644
index 0000000000..0de4b8e3af
--- /dev/null
+++ b/src/models/follow-requests.ts
@@ -0,0 +1,50 @@
+import * as mongo from 'mongodb';
+import db from '../db/mongodb';
+
+const FollowRequest = db.get<IFollowRequest>('followRequests');
+FollowRequest.createIndex(['followerId', 'followeeId'], { unique: true });
+export default FollowRequest;
+
+export type IFollowRequest = {
+	_id: mongo.ObjectID;
+	createdAt: Date;
+	followeeId: mongo.ObjectID;
+	followerId: mongo.ObjectID;
+
+	// 非正規化
+	_followee: {
+		host: string;
+		inbox?: string;
+	},
+	_follower: {
+		host: string;
+		inbox?: string;
+	}
+};
+
+/**
+ * FollowRequestを物理削除します
+ */
+export async function deleteFollowRequest(followRequest: string | mongo.ObjectID | IFollowRequest) {
+	let f: IFollowRequest;
+
+	// Populate
+	if (mongo.ObjectID.prototype.isPrototypeOf(followRequest)) {
+		f = await FollowRequest.findOne({
+			_id: followRequest
+		});
+	} else if (typeof followRequest === 'string') {
+		f = await FollowRequest.findOne({
+			_id: new mongo.ObjectID(followRequest)
+		});
+	} else {
+		f = followRequest as IFollowRequest;
+	}
+
+	if (f == null) return;
+
+	// このFollowingを削除
+	await FollowRequest.remove({
+		_id: f._id
+	});
+}
diff --git a/src/models/user.ts b/src/models/user.ts
index 11eafe05ea..8dfd783a9f 100644
--- a/src/models/user.ts
+++ b/src/models/user.ts
@@ -22,6 +22,7 @@ import FollowedLog, { deleteFollowedLog } from './followed-log';
 import SwSubscription, { deleteSwSubscription } from './sw-subscription';
 import Notification, { deleteNotification } from './notification';
 import UserList, { deleteUserList } from './user-list';
+import FollowRequest, { deleteFollowRequest } from './follow-requests';
 
 const User = db.get<IUser>('users');
 
@@ -50,7 +51,17 @@ type IUserBase = {
 	data: any;
 	description: string;
 	pinnedNoteId: mongo.ObjectID;
+
+	/**
+	 * 凍結されているか否か
+	 */
 	isSuspended: boolean;
+
+	/**
+	 * 鍵アカウントか否か
+	 */
+	isLocked: boolean;
+
 	host: string;
 };
 
@@ -240,6 +251,16 @@ export async function deleteUser(user: string | mongo.ObjectID | IUser) {
 		await Following.find({ followeeId: u._id })
 	).map(x => deleteFollowing(x)));
 
+	// このユーザーのFollowRequestをすべて削除
+	await Promise.all((
+		await FollowRequest.find({ followerId: u._id })
+	).map(x => deleteFollowRequest(x)));
+
+	// このユーザーへのFollowRequestをすべて削除
+	await Promise.all((
+		await FollowRequest.find({ followeeId: u._id })
+	).map(x => deleteFollowRequest(x)));
+
 	// このユーザーのFollowingLogをすべて削除
 	await Promise.all((
 		await FollowingLog.find({ userId: u._id })