diff --git "a/leetcode3/\355\231\251\354\235\200\354\247\200/3978. Unique Middle Element.js" "b/leetcode3/\355\231\251\354\235\200\354\247\200/3978. Unique Middle Element.js"
new file mode 100644
index 00000000..5325fa5f
--- /dev/null
+++ "b/leetcode3/\355\231\251\354\235\200\354\247\200/3978. Unique Middle Element.js"	
@@ -0,0 +1,14 @@
+/**
+ * @param {number[]} nums
+ * @return {boolean}
+ */
+var isMiddleElementUnique = function(nums) {
+    const middleIndex=Math.floor(nums.length/2);
+    const middleNum=nums[middleIndex];
+
+    for(let i=0;i<nums.length;i++){
+        if(i===middleIndex) continue;
+        if(nums[i]===middleNum) return false;
+    }
+    return true;
+};
\ No newline at end of file