diff --git a/frontend/src/api/my-study/typeChecker.ts b/frontend/src/api/my-study/typeChecker.ts
index 6f97f8f17..7bd827acb 100644
--- a/frontend/src/api/my-study/typeChecker.ts
+++ b/frontend/src/api/my-study/typeChecker.ts
@@ -47,7 +47,7 @@ export const checkMyStudy = (data: unknown): MyStudy => {
     id: checkType(data.id, isNumber),
     title: checkType(data.title, isString),
     startDate: checkType(data.startDate, isDateYMD),
-    endDate: checkType(data.endDate, isDateYMD),
+    endDate: checkType(data.endDate, isDateYMD, true),
     studyStatus: checkType(data.studyStatus, isStudyStatus),
     tags: checkType(data.tags, isArray).map(tag => checkMyStudyTag(tag)),
     owner: checkMember(data.owner),
diff --git a/frontend/src/api/studies/typeChecker.ts b/frontend/src/api/studies/typeChecker.ts
index 771d4db01..e4fde0726 100644
--- a/frontend/src/api/studies/typeChecker.ts
+++ b/frontend/src/api/studies/typeChecker.ts
@@ -1,9 +1,57 @@
 import { AxiosError } from 'axios';
 
-import { arrayOfAll, checkType, hasOwnProperties, isArray, isBoolean, isObject } from '@utils';
+import {
+  arrayOfAll,
+  checkType,
+  hasOwnProperties,
+  isArray,
+  isBoolean,
+  isNumber,
+  isObject,
+  isRecruitmentStatus,
+  isString,
+} from '@utils';
+
+import type { Study, Tag } from '@custom-types';
 
 import { type ApiStudies } from '@api/studies';
-import { checkStudy } from '@api/study/typeChecker';
+
+type MainStudyTag = Pick<Tag, 'id' | 'name'>;
+type MainStudyTagKeys = keyof MainStudyTag;
+
+const arrayOfAllMainStudyTagKeys = arrayOfAll<MainStudyTagKeys>();
+
+const checkMainStudyTag = (data: unknown): MainStudyTag => {
+  if (!isObject(data)) throw new AxiosError(`Main-Tag does not have correct type: object`);
+
+  const keys = arrayOfAllMainStudyTagKeys(['id', 'name']);
+  if (!hasOwnProperties(data, keys)) throw new AxiosError('Main-Tag does not have some properties');
+
+  return {
+    id: checkType(data.id, isNumber),
+    name: checkType(data.name, isString),
+  };
+};
+
+type StudyKeys = keyof Study;
+
+const arrayOfAllStudyKeys = arrayOfAll<StudyKeys>();
+
+const checkStudy = (data: unknown): Study => {
+  if (!isObject(data)) throw new AxiosError(`Main-Study does not have correct type: object`);
+
+  const keys = arrayOfAllStudyKeys(['id', 'excerpt', 'recruitmentStatus', 'tags', 'thumbnail', 'title']);
+  if (!hasOwnProperties(data, keys)) throw new AxiosError('Main-Study does not have some properties');
+
+  return {
+    id: checkType(data.id, isNumber),
+    title: checkType(data.title, isString),
+    excerpt: checkType(data.title, isString),
+    thumbnail: checkType(data.title, isString),
+    tags: checkType(data.tags, isArray).map(tag => checkMainStudyTag(tag)),
+    recruitmentStatus: checkType(data.recruitmentStatus, isRecruitmentStatus),
+  };
+};
 
 type StudiesKeys = keyof ApiStudies['get']['responseData'];