diff --git a/src/app/admin/_components/PostForm.tsx b/src/app/admin/_components/PostForm.tsx
index 8890f75..663cda0 100644
--- a/src/app/admin/_components/PostForm.tsx
+++ b/src/app/admin/_components/PostForm.tsx
@@ -4,26 +4,11 @@ import { useState, useEffect, FormEvent, ChangeEvent } from "react";
 import { useAdmin } from "./useAdmin";
 import MarkdownPreview from "./MarkdownPreview";
 import styles from "./PostForm.module.scss";
-
-interface Category {
-  id: string;
-  main_category: string;
-  sub_category: string;
-}
-
-interface PostFormData {
-  title: string;
-  description: string;
-  markdown: string;
-  category_id: string;
-  thumbnail_id: string | null;
-  is_public: boolean;
-  datocms_id?: string | null;
-}
+import { AdminCategoryType, PostFormDataType } from "@/types/adminType";
 
 interface PostFormProps {
-  initialData?: PostFormData;
-  onSubmit: (formData: PostFormData) => Promise<void>;
+  initialData?: PostFormDataType;
+  onSubmit: (formData: PostFormDataType) => Promise<void>;
 }
 
 export default function PostForm({ initialData, onSubmit }: PostFormProps) {
@@ -31,7 +16,7 @@ export default function PostForm({ initialData, onSubmit }: PostFormProps) {
   const isEditMode = !!initialData;
 
   // Form state
-  const [formData, setFormData] = useState<PostFormData>({
+  const [formData, setFormData] = useState<PostFormDataType>({
     title: initialData?.title || "",
     description: initialData?.description || "",
     markdown: initialData?.markdown || "",
@@ -42,7 +27,7 @@ export default function PostForm({ initialData, onSubmit }: PostFormProps) {
   });
 
   // UI state
-  const [categories, setCategories] = useState<Category[]>([]);
+  const [categories, setCategories] = useState<AdminCategoryType[]>([]);
   const [thumbnailPreviewUrl, setThumbnailPreviewUrl] = useState<string>("");
   const [isUploading, setIsUploading] = useState(false);
   const [isSubmitting, setIsSubmitting] = useState(false);
diff --git a/src/app/admin/_components/PostList.tsx b/src/app/admin/_components/PostList.tsx
index 9983d3b..4afba62 100644
--- a/src/app/admin/_components/PostList.tsx
+++ b/src/app/admin/_components/PostList.tsx
@@ -2,36 +2,10 @@
 
 import Link from "next/link";
 import styles from "./PostList.module.scss";
-
-interface Category {
-  id: string;
-  main_category: string;
-  sub_category: string | null;
-}
-
-interface Thumbnail {
-  id: string;
-  s3_key: string;
-  alt: string | null;
-  title: string | null;
-  width: number;
-  height: number;
-  blur_data_url: string | null;
-}
-
-interface Post {
-  id: string;
-  title: string;
-  description: string | null;
-  is_public: boolean;
-  created_at: string;
-  updated_at: string;
-  category: Category;
-  thumbnail: Thumbnail | null;
-}
+import { AdminCategoryType, AdminPostType } from "@/types/adminType";
 
 interface PostListProps {
-  posts: Post[];
+  posts: AdminPostType[];
   onDelete: (id: string) => Promise<void>;
 }
 
@@ -45,7 +19,7 @@ export default function PostList({ posts, onDelete }: PostListProps) {
     });
   };
 
-  const getCategoryLabel = (category: Category) => {
+  const getCategoryLabel = (category: AdminCategoryType) => {
     if (category.sub_category) {
       return `${category.main_category} / ${category.sub_category}`;
     }
diff --git a/src/types/adminType.ts b/src/types/adminType.ts
new file mode 100644
index 0000000..a5abeb2
--- /dev/null
+++ b/src/types/adminType.ts
@@ -0,0 +1,41 @@
+/**
+ * Admin 컴포넌트용 타입 정의
+ * Supabase 테이블 구조에 직접 매핑되는 타입
+ */
+
+export interface AdminCategoryType {
+  id: string;
+  main_category: string;
+  sub_category: string | null;
+}
+
+export interface AdminThumbnailType {
+  id: string;
+  s3_key: string;
+  alt: string | null;
+  title: string | null;
+  width: number;
+  height: number;
+  blur_data_url: string | null;
+}
+
+export interface AdminPostType {
+  id: string;
+  title: string;
+  description: string | null;
+  is_public: boolean;
+  created_at: string;
+  updated_at: string;
+  category: AdminCategoryType;
+  thumbnail: AdminThumbnailType | null;
+}
+
+export interface PostFormDataType {
+  title: string;
+  description: string;
+  markdown: string;
+  category_id: string;
+  thumbnail_id: string | null;
+  is_public: boolean;
+  datocms_id?: string | null;
+}