diff --git a/packages/backend/src/core/NoteCreateService.ts b/packages/backend/src/core/NoteCreateService.ts
index ba2ead4f83..6caa3d463c 100644
--- a/packages/backend/src/core/NoteCreateService.ts
+++ b/packages/backend/src/core/NoteCreateService.ts
@@ -56,6 +56,7 @@ import { SearchService } from '@/core/SearchService.js';
 import { FeaturedService } from '@/core/FeaturedService.js';
 import { FunoutTimelineService } from '@/core/FunoutTimelineService.js';
 import { UtilityService } from '@/core/UtilityService.js';
+import { UserBlockingService } from '@/core/UserBlockingService.js';
 
 type NotificationType = 'reply' | 'renote' | 'quote' | 'mention';
 
@@ -216,6 +217,7 @@ export class NoteCreateService implements OnApplicationShutdown {
 		private activeUsersChart: ActiveUsersChart,
 		private instanceChart: InstanceChart,
 		private utilityService: UtilityService,
+		private userBlockingService: UserBlockingService,
 	) { }
 
 	@bindThis
@@ -292,6 +294,18 @@ export class NoteCreateService implements OnApplicationShutdown {
 			}
 		}
 
+		// Check blocking
+		if (data.renote && data.text == null && data.poll == null && (data.files == null || data.files.length === 0)) {
+			if (data.renote.userHost === null) {
+				if (data.renote.userId !== user.id) {
+					const blocked = await this.userBlockingService.checkBlocked(data.renote.userId, user.id);
+					if (blocked) {
+						throw new Error('blocked');
+					}
+				}
+			}
+		}
+
 		// 返信対象がpublicではないならhomeにする
 		if (data.reply && data.reply.visibility !== 'public' && data.visibility === 'public') {
 			data.visibility = 'home';