diff --git a/trees/bt_postorder.py b/trees/bt_postorder.py
new file mode 100644
index 0000000..e5d8826
--- /dev/null
+++ b/trees/bt_postorder.py
@@ -0,0 +1,11 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+# author: bt3gl
+
+def postorder(root) -> list:
+        
+  if root is None:
+      return []
+    
+  return postorder(root.left) + postorder(root.right) + [root.val] 
+