To enable a player to feel reality that a game is played alone by constituting an island main body by fixing many game machines in a horizontal direction and providing independent shelf plates projected from the island main body into the direction of a playing customer so as to correspond to the respective game machines.

In an island 10 where many game machines are arranged side by side in the horizontal direction, the independent shelf plates 70 in a rectangular plate shape projected from the island main body into the direction of the playing customer are formed at the island main body at the lower part of the game machines 20 for the respective game machines 20. For the respective shelf plates 70, a transparent plate 61 is arranged on a part of the upper surface of the shelf plate 70 and the display body 62 of a stand number or the like is formed at the lower part of the transparent plate 61. Also, an ashtray housing part 60 in a box shape for housing an ashtray 63 or the like is formed at the end part on its left side where the transparent plate 61 is not formed of the shelf plate 70 and an umbrella locking part 30 capable of inserting the tip of an umbrella 31 in a slightly oblique direction from a vertical direction is formed at the equivalent island main body at the lower part between the adjacent shelf plate 70.