To present a site pressure feeling and arouse the interest of a player by providing expanding/shrinking means expanding/shrinking in the substantially orthogonal direction to a circulation locus and moving mobile pieces in the orthogonal direction to the moving direction of a circulating means.

A rail 13 is arranged on a support plate 12 horizontally stretched in a cabinet 11 to form a circulation locus. A travel base 14 is mounted on a rail 13, and the travel base 14 is provided with mobile pieces 15 magnetically attracting multiple travel patterns 4a via a travel plate 15. Carriers 16 supporting the mobile pieces 15 are supported by guide rollers movably along a guide rail 17 extended in the moving direction of the travel base 14. Metal plate spring members 30 are provided to move the mobile pieces 15 in the orthogonal direction to the moving direction of the travel base 4 from the carrier 16 of the travel base 14, and the carriers 16 are provided with storage means storing the metal plate spring members 30.