diff --git a/packages/backend/src/core/FanoutTimelineEndpointService.ts b/packages/backend/src/core/FanoutTimelineEndpointService.ts
index b05af99c5e..94208b9ddf 100644
--- a/packages/backend/src/core/FanoutTimelineEndpointService.ts
+++ b/packages/backend/src/core/FanoutTimelineEndpointService.ts
@@ -33,6 +33,7 @@ type TimelineOptions = {
 	excludeNoFiles?: boolean;
 	excludeReplies?: boolean;
 	excludePureRenotes: boolean;
+	ignoreAuthorFromUserSuspension?: boolean;
 	dbFallback: (untilId: string | null, sinceId: string | null, limit: number) => Promise<MiNote[]>,
 };
 
@@ -119,6 +120,19 @@ export class FanoutTimelineEndpointService {
 				};
 			}
 
+			{
+				const parentFilter = filter;
+				filter = (note) => {
+					if (!ps.ignoreAuthorFromUserSuspension) {
+						if (note.user!.isSuspended) return false;
+					}
+					if (note.userId !== note.renoteUserId && note.renoteUser?.isSuspended) return false;
+					if (note.userId !== note.replyUserId && note.replyUser?.isSuspended) return false;
+
+					return parentFilter(note);
+				};
+			}
+
 			const redisTimeline: MiNote[] = [];
 			let readFromRedis = 0;
 			let lastSuccessfulRate = 1; // rateをキャッシュする？
diff --git a/packages/backend/src/models/Note.ts b/packages/backend/src/models/Note.ts
index 9a95c6faab..e0d3f7a4d9 100644
--- a/packages/backend/src/models/Note.ts
+++ b/packages/backend/src/models/Note.ts
@@ -229,6 +229,10 @@ export class MiNote {
 		comment: '[Denormalized]',
 	})
 	public renoteUserHost: string | null;
+
+	// some query includes the following fields
+	public renoteUser?: MiUser | null;
+	public replyUser?: MiUser | null;
 	//#endregion
 
 	constructor(data: Partial<MiNote>) {
diff --git a/packages/backend/src/server/api/endpoints/users/notes.ts b/packages/backend/src/server/api/endpoints/users/notes.ts
index f5b7a07b01..caee694074 100644
--- a/packages/backend/src/server/api/endpoints/users/notes.ts
+++ b/packages/backend/src/server/api/endpoints/users/notes.ts
@@ -129,6 +129,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				redisTimelines,
 				useDbFallback: true,
 				ignoreAuthorFromMute: true,
+				ignoreAuthorFromUserSuspension: true,
 				excludeReplies: ps.withChannelNotes && !ps.withReplies, // userTimelineWithChannel may include replies
 				excludeNoFiles: ps.withChannelNotes && ps.withFiles, // userTimelineWithChannel may include notes without files
 				excludePureRenotes: !ps.withRenotes,