diff --git a/free-courses-en.md b/free-courses-en.md
index 424f7539f..8338e900a 100644
--- a/free-courses-en.md
+++ b/free-courses-en.md
@@ -235,6 +235,7 @@
 
 * [CS50 2019 - Games Track](https://www.youtube.com/playlist?list=PLhQjrBD2T382mHvZB-hSYWvoLzYQzT_Pb) - David J. Malan (Harvard OpenCourseWare)
 * [Unity Beginner Fundamentals](https://learn.unity.com/course/unity-beginner-fundamentals)(Unity Learn)
+* [Unity User Manual](https://docs.unity3d.com/Manual/)
 
 
 ### Git