diff --git a/packages/backend/src/core/NotificationService.ts b/packages/backend/src/core/NotificationService.ts
index 80b2bd726..e09859569 100644
--- a/packages/backend/src/core/NotificationService.ts
+++ b/packages/backend/src/core/NotificationService.ts
@@ -111,6 +111,11 @@ export class NotificationService implements OnApplicationShutdown {
 				return null;
 			}
 
+			const blockings = await this.cacheService.userBlockingCache.fetch(notifieeId);
+			if (blockings.has(notifierId)) {
+				return null;
+			}
+
 			if (recieveConfig?.type === 'following') {
 				const isFollowing = await this.cacheService.userFollowingsCache.fetch(notifieeId).then(followings => Object.hasOwn(followings, notifierId));
 				if (!isFollowing) {
diff --git a/packages/backend/src/core/entities/NotificationEntityService.ts b/packages/backend/src/core/entities/NotificationEntityService.ts
index 6770bcd05..8053cae5a 100644
--- a/packages/backend/src/core/entities/NotificationEntityService.ts
+++ b/packages/backend/src/core/entities/NotificationEntityService.ts
@@ -270,11 +270,13 @@ export class NotificationEntityService implements OnModuleInit {
 	#validateNotifier <T extends MiNotification | MiGroupedNotification> (
 		notification: T,
 		userIdsWhoMeMutingWithNotification: Set<MiUser['id']>,
+		userIdsWhoMeBlocking: Set<MiUser['id']>,
 		userMutedInstances: Set<string>,
 		notifiers: MiUser[],
 	): boolean {
 		if (!('notifierId' in notification)) return true;
 		if (userIdsWhoMeMutingWithNotification.has(notification.notifierId)) return false;
+		if (userIdsWhoMeBlocking.has(notification.notifierId)) return false;
 
 		const notifier = notifiers.find(x => x.id === notification.notifierId) ?? null;
 
@@ -304,9 +306,11 @@ export class NotificationEntityService implements OnModuleInit {
 	): Promise<T[]> {
 		const [
 			userIdsWhoMeMutingWithNotification,
+			userIdsWhoMeBlocking,
 			userMutedInstances,
 		] = (await Promise.allSettled([
 			this.cacheService.userMutingsWithNotificationCache.fetch(meId),
+			this.cacheService.userBlockingCache.fetch(meId),
 			this.cacheService.userProfileCache.fetch(meId).then(p => new Set(p.mutedInstances)),
 		])).map(result => result.status === 'fulfilled' ? result.value : new Set<string>());
 
@@ -316,7 +320,7 @@ export class NotificationEntityService implements OnModuleInit {
 		}) : [];
 
 		return ((await Promise.allSettled(notifications.map(async (notification) => {
-			const isValid = this.#validateNotifier(notification, userIdsWhoMeMutingWithNotification, userMutedInstances, notifiers);
+			const isValid = this.#validateNotifier(notification, userIdsWhoMeMutingWithNotification, userIdsWhoMeBlocking, userMutedInstances, notifiers);
 			return isValid ? notification : null;
 		}))).filter(result => result.status === 'fulfilled' && isNotNull(result.value))
 			.map(result => (result as PromiseFulfilledResult<T>).value));