GAME MACHINE

PROBLEM TO BE SOLVED: To prevent and detect an unfair action in which a game player inserts a foreign substance into a gap communicating in the front and back direction between an inner door frame and a machine frame by a simple constitution.SOLUTION: A guide pin 113 supports a movable member 105 on the machine frame 1 so that the movable member is freely slidable and movable in the forward and backward direction, and regulates a movable range to the forward of the movable member 105 to the machine frame 1 at a predetermined reference position. A coils spring 117 energizes forward the movable member 105. An inner door frame opening detecting switch 79 is fixed on the inner door frame 2, detects the opening movement of the inner door frame 2 from the closed position, and outputs an opening detecting signal. The movable member 105 has a blocking part 106 covering a gap 103 from the back. The movable member 105 has a detecting objective part 107 arranged within a predetermined detecting range on the back of the inner door frame opening detecting switch 79. The inner door frame opening detecting switch 79 outputs an opening detecting signal when the detecting objective part 107 comes out of the detecting range.