diff --git a/docs/rules/no-invalid-this.md b/docs/rules/no-invalid-this.md
index 87d5387ac60..b6733eded56 100644
--- a/docs/rules/no-invalid-this.md
+++ b/docs/rules/no-invalid-this.md
@@ -6,7 +6,7 @@ Under the strict mode, `this` keywords outside of classes or class-like objects
 
 This rule aims to flag usage of `this` keywords outside of classes or class-like objects.
 
-Basically this rule checks whether or not a function which are containing `this` keywords is a constructor or a method.
+Basically, this rule checks whether or not a function containing `this` keyword is a constructor or a method.
 
 This rule judges from following conditions whether or not the function is a constructor: