diff --git a/src/components/main/MainContents.jsx b/src/components/main/MainContents.jsx
index b390adcd..d00e57d8 100644
--- a/src/components/main/MainContents.jsx
+++ b/src/components/main/MainContents.jsx
@@ -213,7 +213,7 @@ export default function MainContents() {
           {boardList.length > 0 ? (
             <div className="data-download-wrap">
               {boardList?.map((board) => (
-                <button type="button" className="data-down" onClick={() => handleFileDown(board.noticeNo, 'Y')}>
+                <button type="button" key={board.noticeNo} className="data-down" onClick={() => handleFileDown(board.noticeNo, 'Y')}>
                   <span>{board.title}</span>
                 </button>
               ))}