diff --git a/README_EN.MD b/README_EN.MD
index c2839820..5992b317 100644
--- a/README_EN.MD
+++ b/README_EN.MD
@@ -121,6 +121,8 @@ Notice：
 		- [Open FullScreen Event](#openfullscreenevent)
 
 		- [Exit FullScreen Event](#closefullscreenevent)
+		
+		- [Callback Play State](#callbackplaystate)
 
 	- [Player API Document](#playerapidocument)
 
@@ -665,6 +667,17 @@ player.onCloseFullScreen = () => {
 };
 ```
 
+#### CallbackPlayState ####
+
+* Example
+
+```javascript
+player.onPlayState = (state) => {
+    // state
+    // true: playing / false: paused
+};
+```
+
 <br>
 
 ### PlayerAPIDocument ###