A gaming machine capable of maintaining the interest of a player even when the gaming machine does not work normally. For, example, a slot machine (10) comprises a display device (30) for displaying an image, and an image state control unit for controlling the display device (30) to display an image relating to a game. The slot machine (10) may be characterized in that the image state control unit controls the display device into a predetermined state upon determination that an image signal relating to the image provided to the display device fails to satisfy a predetermined condition.