diff --git a/src/client/components/note.vue b/src/client/components/note.vue
index a359287b41..69ab4ae444 100644
--- a/src/client/components/note.vue
+++ b/src/client/components/note.vue
@@ -71,10 +71,10 @@
 				<button v-else class="button _button">
 					<fa :icon="faBan"/>
 				</button>
-				<button v-if="!isMyNote && appearNote.myReaction == null" class="button _button" @click="react()" ref="reactButton">
+				<button v-if="appearNote.myReaction == null" class="button _button" @click="react()" ref="reactButton">
 					<fa :icon="faPlus"/>
 				</button>
-				<button v-if="!isMyNote && appearNote.myReaction != null" class="button _button reacted" @click="undoReact(appearNote)" ref="reactButton">
+				<button v-if="appearNote.myReaction != null" class="button _button reacted" @click="undoReact(appearNote)" ref="reactButton">
 					<fa :icon="faMinus"/>
 				</button>
 				<button class="button _button" @click="menu()" ref="menuButton">
diff --git a/src/client/components/reactions-viewer.reaction.vue b/src/client/components/reactions-viewer.reaction.vue
index 639a1603ca..763f4e9e9a 100644
--- a/src/client/components/reactions-viewer.reaction.vue
+++ b/src/client/components/reactions-viewer.reaction.vue
@@ -51,11 +51,8 @@ export default Vue.extend({
 		};
 	},
 	computed: {
-		isMe(): boolean {
-			return this.$store.getters.isSignedIn && this.$store.state.i.id === this.note.userId;
-		},
 		canToggle(): boolean {
-			return !this.reaction.match(/@\w/) && !this.isMe && this.$store.getters.isSignedIn;
+			return !this.reaction.match(/@\w/) && this.$store.getters.isSignedIn;
 		},
 	},
 	watch: {
diff --git a/src/remote/activitypub/kernel/like.ts b/src/remote/activitypub/kernel/like.ts
index a877110303..a6f02a1f8f 100644
--- a/src/remote/activitypub/kernel/like.ts
+++ b/src/remote/activitypub/kernel/like.ts
@@ -9,8 +9,6 @@ export default async (actor: IRemoteUser, activity: ILike) => {
 	const note = await fetchNote(targetUri);
 	if (!note) return `skip: target note not found ${targetUri}`;
 
-	if (actor.id === note.userId) return `skip: cannot react to my note`;
-
 	await extractEmojis(activity.tag || [], actor.host).catch(() => null);
 
 	await create(actor, note, activity._misskey_reaction || activity.content || activity.name);
diff --git a/src/server/api/endpoints/notes/reactions/create.ts b/src/server/api/endpoints/notes/reactions/create.ts
index 6abc7e3059..9017d9f36f 100644
--- a/src/server/api/endpoints/notes/reactions/create.ts
+++ b/src/server/api/endpoints/notes/reactions/create.ts
@@ -40,12 +40,6 @@ export const meta = {
 			id: '033d0620-5bfe-4027-965d-980b0c85a3ea'
 		},
 
-		isMyNote: {
-			message: 'You can not react to your own notes.',
-			code: 'IS_MY_NOTE',
-			id: '7eeb9714-b047-43b5-b559-7b1b72810f53'
-		},
-
 		alreadyReacted: {
 			message: 'You are already reacting to that note.',
 			code: 'ALREADY_REACTED',
@@ -60,7 +54,6 @@ export default define(meta, async (ps, user) => {
 		throw e;
 	});
 	await createReaction(user, note, ps.reaction).catch(e => {
-		if (e.id === '2d8e7297-1873-4c00-8404-792c68d7bef0') throw new ApiError(meta.errors.isMyNote);
 		if (e.id === '51c42bb4-931a-456b-bff7-e5a8a70dd298') throw new ApiError(meta.errors.alreadyReacted);
 		throw e;
 	});
diff --git a/src/services/note/reaction/create.ts b/src/services/note/reaction/create.ts
index f3637352c0..bfa95b087b 100644
--- a/src/services/note/reaction/create.ts
+++ b/src/services/note/reaction/create.ts
@@ -15,11 +15,6 @@ import { createNotification } from '../../create-notification';
 import deleteReaction from './delete';
 
 export default async (user: User, note: Note, reaction?: string) => {
-	// Myself
-	if (note.userId === user.id) {
-		throw new IdentifiableError('2d8e7297-1873-4c00-8404-792c68d7bef0', 'cannot react to my note');
-	}
-
 	reaction = await toDbReaction(reaction, user.host);
 
 	const exist = await NoteReactions.findOne({