diff --git a/frontend/src/components/Board.js b/frontend/src/components/Board.js
index 7e9358c2714b08be4d9f87476ce7e7576b321acd..2b403472d0fb11d8a71a1b07c5d5b3555c4ff0f3 100644
--- a/frontend/src/components/Board.js
+++ b/frontend/src/components/Board.js
@@ -30,7 +30,7 @@ const Board = () => {
       </form>
       <ol>
         {response.map((res) => (
-          <li>
+          <li key={res._id}>
             <Link to="/detailBoard">
               {res.title} {res.created_at}
             </Link>