diff --git a/backend/routes/index.js b/backend/routes/index.js
index fa55854..27a8c87 100644
--- a/backend/routes/index.js
+++ b/backend/routes/index.js
@@ -6,11 +6,20 @@ const router = express.Router();
 
 const modifyLink = require('../services/modifyLink');
 
+const cachedResult = new Map();
+
 router.get('/', async (req, res) => {
     try {
         const url = urlencode.decode(req.query.url);
         if (!url) return res.status(400).end('URL을 파라미터에 포함해야 합니다.');
         if (!isUrl(url)) return res.status(400).end('잘못된 형식의 URL입니다.');
+
+        // cache hit
+        if (cachedResult.get(url)) {
+            return res.end(cachedResult.get(url));
+        }
+
+        // cache miss
         const result = await axios.get(url, {
             headers: {
                 connection: 'keep-alive',
@@ -22,7 +31,10 @@ router.get('/', async (req, res) => {
         const html = result.data;
         if (!html) return res.status(404).end('HTML을 받아오지 못했습니다.');
     
+        // caching
         const modified_html = modifyLink(url, html);
+        cachedResult.set(url, modified_html);
+
         return res.end(modified_html);
     } catch (e) {
         return res.status(500).end('알 수 없는 오류가 발생했습니다.');