A slot machine comprises a housing (2) provided with an operation panel (8) on a front side thereof; a main display device (7) disposed above the operation panel; a sub-display device (31) disposed on the operation panel (8); a main input device capable of issuing information corresponding to an operation of a player thereto; and a game controller (50) for controlling a process of a game performed on a screen of the main display device (7) with referring to the information issued from the main input device. The main input device comprises a first input device (21, 22, 23, 24) provided on the operation panel (8) and the second input device (57) provided on the screen of the main display device (7) or a periphery thereof to thereby facilitate an observation of the sub-display device (31).