diff --git a/src/mocks/services/teamServiceHandler.ts b/src/mocks/services/teamServiceHandler.ts
index 4fe8db51..64034780 100644
--- a/src/mocks/services/teamServiceHandler.ts
+++ b/src/mocks/services/teamServiceHandler.ts
@@ -7,6 +7,8 @@ import {
   TEAM_DUMMY,
   TEAM_USER_DUMMY,
   JWT_TOKEN_DUMMY,
+  TASK_USER_DUMMY,
+  TASK_FILE_DUMMY,
 } from '@mocks/mockData';
 
 const BASE_URL = import.meta.env.VITE_BASE_URL;
@@ -28,7 +30,7 @@ const teamServiceHandler = [
     const accessToken = request.headers.get('Authorization');
     const { teamId } = params;
     const [, payload] = JWT_TOKEN_DUMMY.split('.');
-    // TODO: 실제 userId로 넣어주기
+    // 실제 userId로 넣어주기
     const userId = Number(payload.replace('mocked-payload-', ''));
     if (!accessToken) return new HttpResponse(null, { status: 401 });
 
@@ -39,30 +41,25 @@ const teamServiceHandler = [
     TEAM_USER_DUMMY.length = 0;
     TEAM_USER_DUMMY.push(...filteredTeamUsers);
 
+    const projectIds = PROJECT_DUMMY.filter((project) => project.teamId === Number(teamId)).map(
+      (project) => project.projectId,
+    );
+
     const filteredProjectUsers = PROJECT_USER_DUMMY.filter(
-      (projectUser) => !(projectUser.projectId === Number(teamId) && projectUser.userId === Number(userId)),
+      (projectUser) => !(projectIds.includes(projectUser.projectId) && projectUser.userId === Number(userId)),
     );
 
     PROJECT_USER_DUMMY.length = 0;
     PROJECT_USER_DUMMY.push(...filteredProjectUsers);
 
-    const projectIds = PROJECT_DUMMY.filter((project) => project.teamId === Number(teamId)).map(
-      (project) => project.projectId,
-    );
-
-    const filteredTasks = TASK_DUMMY.map((task) => {
-      const projectId = STATUS_DUMMY.find((status) => status.statusId === task.statusId)?.projectId;
-      if (projectId && projectIds.includes(projectId)) {
-        return {
-          ...task,
-          userId: task.userId.filter((id) => id !== Number(userId)),
-        };
-      }
-      return task;
+    const filteredTaskUsers = TASK_USER_DUMMY.filter((taskUser) => {
+      const task = TASK_DUMMY.find((task) => task.taskId === taskUser.taskId);
+      const statusId = task ? task.statusId : undefined;
+      const projectId = statusId ? STATUS_DUMMY.find((status) => status.statusId === statusId)?.projectId : undefined;
+      return !(projectId && projectIds.includes(projectId) && taskUser.userId === Number(userId));
     });
-
-    TASK_DUMMY.length = 0;
-    TASK_DUMMY.push(...filteredTasks);
+    TASK_USER_DUMMY.length = 0;
+    TASK_USER_DUMMY.push(...filteredTaskUsers);
 
     return new HttpResponse(null, { status: 204 });
   }),
@@ -82,26 +79,44 @@ const teamServiceHandler = [
     TEAM_USER_DUMMY.length = 0;
     TEAM_USER_DUMMY.push(...filteredTeamUsers);
 
-    const projectIdsToDelete = new Set<number>(
-      PROJECT_DUMMY.filter((project) => project.teamId === Number(teamId)).map((project) => project.projectId),
+    const projectIdsToDelete = PROJECT_DUMMY.filter((project) => project.teamId === Number(teamId)).map(
+      (project) => project.projectId,
     );
 
-    const statusIdsToDelete = new Set<number>(
-      STATUS_DUMMY.filter((status) => projectIdsToDelete.has(status.projectId)).map((status) => status.statusId),
+    const statusIdsToDelete = STATUS_DUMMY.filter((status) => projectIdsToDelete.includes(status.projectId)).map(
+      (status) => status.statusId,
     );
 
-    const filteredProjects = PROJECT_DUMMY.filter((project) => !projectIdsToDelete.has(project.projectId));
+    const filteredProjects = PROJECT_DUMMY.filter((project) => !projectIdsToDelete.includes(project.projectId));
     PROJECT_DUMMY.length = 0;
     PROJECT_DUMMY.push(...filteredProjects);
 
-    const filteredStatuses = STATUS_DUMMY.filter((status) => !statusIdsToDelete.has(status.statusId));
+    const filteredStatuses = STATUS_DUMMY.filter((status) => !statusIdsToDelete.includes(status.statusId));
     STATUS_DUMMY.length = 0;
     STATUS_DUMMY.push(...filteredStatuses);
 
-    const filteredTasks = TASK_DUMMY.filter((task) => !statusIdsToDelete.has(task.statusId));
+    const filteredTasks = TASK_DUMMY.filter((task) => !statusIdsToDelete.includes(task.statusId));
     TASK_DUMMY.length = 0;
     TASK_DUMMY.push(...filteredTasks);
 
+    const filteredTaskFiles = TASK_FILE_DUMMY.filter((taskFile) => {
+      const task = TASK_DUMMY.find((task) => task.taskId === taskFile.taskId);
+      const statusId = task ? task.statusId : undefined;
+      const projectId = statusId ? STATUS_DUMMY.find((status) => status.statusId === statusId)?.projectId : undefined;
+      return !(projectId && projectIdsToDelete.includes(projectId));
+    });
+    TASK_FILE_DUMMY.length = 0;
+    TASK_FILE_DUMMY.push(...filteredTaskFiles);
+
+    const filteredTaskUsers = TASK_USER_DUMMY.filter((taskUser) => {
+      const task = TASK_DUMMY.find((task) => task.taskId === taskUser.taskId);
+      const statusId = task ? task.statusId : undefined;
+      const projectId = statusId ? STATUS_DUMMY.find((status) => status.statusId === statusId)?.projectId : undefined;
+      return !(projectId && projectIdsToDelete.includes(projectId));
+    });
+    TASK_USER_DUMMY.length = 0;
+    TASK_USER_DUMMY.push(...filteredTaskUsers);
+
     return new HttpResponse(null, { status: 204 });
   }),