diff --git a/src/app/(app)/community/new/page.tsx b/src/app/(app)/community/new/page.tsx
index f91968a..3383793 100644
--- a/src/app/(app)/community/new/page.tsx
+++ b/src/app/(app)/community/new/page.tsx
@@ -276,6 +276,7 @@ export default function CommunityNewPage() {
         content: text.trim(),
         mediaList: uploaded.map((m, i) => ({
           url: m.url,
+          thumbnailUrl: m.thumbnailUrl,
           mediaType: m.mediaType,
           sortOrder: i,
           placeId: mediaPlaces[i]?.placeId ?? null,
diff --git a/src/lib/api/posts.ts b/src/lib/api/posts.ts
index 1717535..25a98a3 100644
--- a/src/lib/api/posts.ts
+++ b/src/lib/api/posts.ts
@@ -14,6 +14,8 @@ type FeedParams = {
 
 type UploadedMedia = {
   url: string;
+  /** 목록용 축소본. 서버가 만들지 못했으면 null 이고, 이때 화면은 원본을 쓴다 */
+  thumbnailUrl: string | null;
   mediaType: "IMAGE" | "VIDEO";
 };
 
diff --git a/src/types/api/post.ts b/src/types/api/post.ts
index 7ff43e3..96358cb 100644
--- a/src/types/api/post.ts
+++ b/src/types/api/post.ts
@@ -6,6 +6,8 @@ export type PostAuthor = {
 
 export type PostMedia = {
   url: string;
+  /** 목록용 축소본. 없으면 화면이 url 을 쓴다 */
+  thumbnailUrl?: string | null;
   mediaType: "IMAGE" | "VIDEO";
   sortOrder: number;
   placeId: number | null;