diff --git a/DIRECTORY.md b/DIRECTORY.md
index e8be6a9c5..e1558613b 100644
--- a/DIRECTORY.md
+++ b/DIRECTORY.md
@@ -42,6 +42,7 @@
   * [Queue Using Linked List](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/data_structures/queue_using_linked_list.cpp)
   * [Queue Using Linkedlist](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/data_structures/queue_using_linkedlist.cpp)
   * [Queue Using Two Stacks](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/data_structures/queue_using_two_stacks.cpp)
+  * [Rb Tree](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/data_structures/rb_tree.cpp)
   * [Skip List](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/data_structures/skip_list.cpp)
   * [Stack](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/data_structures/stack.h)
   * [Stack Using Array](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/data_structures/stack_using_array.cpp)