A game machine is provided with a board having a surface (11) configuring the game region where a metallic body as a medium moves, a cover (10a) covering the surface (11) and holding a space in which the metallic body moves on the surface (11), a mounting frame (38) for mounting the board and the cover. Also, the machine is provided with a matrix sensor (20) which is mounted on the cover (10a) and having sensor units for sensing the metallic body in the form of a matrix, and a signal processing unit for sensing the position of the metallic body on the surface (11) by driving the matrix sensor (20). At least part of the signal processing unit including the portion being in connection with the matrix sensor (20) is disposed on the outside of the game region in the space surrounded by the mounting frame (38). IMAGE
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