diff --git a/maximum-depth-of-binary-tree/yeonjukim164.java b/maximum-depth-of-binary-tree/yeonjukim164.java
new file mode 100644
index 0000000000..a7078c0104
--- /dev/null
+++ b/maximum-depth-of-binary-tree/yeonjukim164.java
@@ -0,0 +1,14 @@
+class Solution {
+    public int maxDepth(TreeNode root) {
+        // Base Case: 노드가 없으면 깊이는 0
+        if (root == null) {
+            return 0;
+        }
+
+        // Recursive Step: 왼쪽 깊이와 오른쪽 깊이 중 더 깊은 곳 + 1 (내 키)
+        int leftDepth = maxDepth(root.left);
+        int rightDepth = maxDepth(root.right);
+
+        return Math.max(leftDepth, rightDepth) + 1;
+    }
+}