SLOT MACHINE

PROBLEM TO BE SOLVED: To provide a slot machine for preventing a fraudulent act, for example, for altering commands transmitted from a main control board to a sub-control board by monitoring presence or absence of consistency in processing between the main control board and the sub-control board.SOLUTION: The slot machine (10) includes the main control board (100) for controlling progress of a game and the sub-control board (200) for controlling performance of a game, and stop operation signals from at least stop switches (56L, 56C, 56R) are input to both the main and sub-control boards. The main control board transmits commands obtained by encoding various kinds of information to the sub-control board, and the sub-control board executes an AT lottery, a performance, and the like depending on the received commands. A consistency discrimination means (651) of the sub-control board determines a display mode of a pattern uniquely based on a combination lottery result indicated by a combination lottery result command, a rotary position signal of a reel, and a stop operation signal from the stop switches, and discriminates consistency with information on a stop position of a reel indicated by a stop position data command.