PROBLEM TO BE SOLVED: To provide a game island capable of surely releasing heat in the island to the outside and, while allowing placement of an object on a ceiling board, avoiding such a fraud as to insert a foreign object from the ceiling board.;SOLUTION: In the mounting state, a ceiling board 30 includes: flat surface parts 31 disposed on both ends in the lateral direction of a game island 1 where Pachinko machines 2 are aligned; and a convex-cross-sectional protrusion 32 at a substantially central position in the lateral direction of the game island 1 between the respective flat surface parts into a streak-like manner along the longitudinal direction of the game island 1. Heat generated inside the game island 1 is released outside from an upper end of the game island 1 via a plurality of heat release holes bored in parallel on both side walls of the protrusion 32. This configuration can reliably release the heat inside the island to the outside and, while allowing the placement of an object on the ceiling board 30, can avoid such a fraud as to insert a foreign object from the ceiling board 30.;COPYRIGHT: (C)2015,JPO&INPIT
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