To provide a game board allowing a menu to be displayed at suitable timing.

A slot machine 100 includes an information display button for menu display. When a game is started, an effective period TE allowing operation of an information display button 146 to be received is started after a standby period TW elapses from start of the game. Contrarily, when the game is interrupted by, for example, opening a door, the effective period TE is started from a point of time when the interruption is completed by, for example, closing the door.