diff --git a/kotlin/20-Valid-Parentheses.kt b/kotlin/20-Valid-Parentheses.kt
new file mode 100644
index 000000000..163f36d54
--- /dev/null
+++ b/kotlin/20-Valid-Parentheses.kt
@@ -0,0 +1,16 @@
+class Solution {
+    fun isValid(s: String): Boolean {
+        if (s.length % 2 == 1) return false
+
+        val map = hashMapOf('(' to ')', '[' to ']', '{' to '}')
+        val stack = Stack<Char>()
+
+        for (c in s) {
+            if (map.containsKey(c))
+                stack.push(c)
+            else if (stack.isEmpty() || map[stack.pop()] != c)
+                return false
+        }
+        return stack.isEmpty()
+    }
+}