To provide a handle structure capable of performing unfailing self-holding movement without the rotation failure or damage of a handle ring.

The game ball launcher comprises a stopper member 4 made of rubber in a rear surface recess 121 of a protruding portion 12 to be hooked by the finger on a handle ring 1. The stopper member 4 is compressed toward the outer periphery 21 of an opening on a handle base 2 to contact the same at the bevel 4a of a protruding portion 421 thereof at a predetermined pressure by inserting a coin 5 as a presser member between the inclined face 4c of the stopper member 4 and the inner wall of the rear surface recess 121.