To change a design of a game area of a game machine at low costs.

In a game machine, a game area is composed of a light transmissive synthetic resin plate or is covered with the synthetic resin plate. In the game machine, the synthetic resin plate is a light guide plate 342 for guiding light entering from an end face to the entire plate. On the rear of the light guide plate 342, a design 342m capable of reflecting light entering from the end face to the front side is drawn. A plurality of light sources for applying light to the end face of the light guide plate 342 are disposed around the light guide plate 342, such that the light sources are turned on or off automatically by an electric circuit.