To provide a game machine capable of preventing unfair practice.

A first operating body 21 equipped with an upper and a lower hooks 27 capable of making the front frame locked to an outer frame 12 by linking to a linking portion 36 of the outer frame 12 to a supporting body 17 is installed to a supporting body 17 of a locking device 16. In the locked state, a linked recess 52c of a lock body 52 is linked to a linked bend portion 27a of the first operating body 21 thereby restricting the movement of the first operating body 21. A cam plate 46 is provided for the supporting body 17, the lock body 52 is rotated by the rotation of the cam plate 46, and thus the linkage between the linked recess 52c and linked bend portion 27a can be released, in addition, by moving the first operating body 21 downward, the linkage between the upper portion and lower portion hook 27 and linking portion 36 can be released. When the linkage between the linked recess 52c and the linked bend portion 27a is released, the lock body 52 is rotated in a direction separating from the first operating body 21 by the second coil spring 55.