To provide a system including a game start button (b) and a sensor (c), whereby before starting a game, a player operates the button (b) turn on a power supply, and after the customer ends the game, the power supply of the game machine is turned off the action of the sensor (C) whose time can be set, thereby solving the problem that since in a game parlor, the pachinko machine and pachinko-slot machine are always in the power-on state during its business hour, resulting in wasteful consumption of power to cause global warming.

The machine body (a) is provided with the game start button (b) operated by the player and the sensor (c) for sensing the end of the player's game. The game start button (b) and the sensor (c) are quadrangular, for example.