It is possible to arrange a plurality of wheel pins 281 on an inclined face 28 formed so as to follow an outer circumferential direction of a plurality of pockets 23 formed in a roulette device 2. These wheel pins 281 include threaded holes 282 and insertion pins 283, and match positions of through holes 284 formed in the inclined face 28 and the threaded holes 282, and are fastened with screws 286 inserted from a back surface side of the inclined face 28 to be detachable. In addition, concave portions 285 formed according to a distance between the threaded holes 282 and the insertion pins 283 in the wheel pins 281 are formed in the inclined face 28, and the insertion pins 283 are inserted and cause a direction of the wheel pins 281 to be fixed.