diff --git a/Trees and Graphs/Diameter of Binary Tree.txt b/Trees and Graphs/Diameter of Binary Tree.txt
new file mode 100644
index 0000000..8d72ca1
--- /dev/null
+++ b/Trees and Graphs/Diameter of Binary Tree.txt	
@@ -0,0 +1,21 @@
+#include<bits/stdc++.h>
+int height(Node *n)
+{
+    if(n==NULL)
+    return 0;
+    
+    return 1+max(height(n->left),height(n->right));
+}
+int diameter(Node* node) {
+    // Your code here
+    if(node==NULL)
+    return 0;
+    
+    int lh=height(node->left);
+    int rh=height(node->right);
+    
+    int ld=diameter(node->left);
+    int rd=diameter(node->right);
+    
+    return max(1+lh+rh,max(ld,rd));
+}
\ No newline at end of file