To provide a game machine capable of preventing erroneous operation of a specified operation button such as an accounting button and attaining the excellent operability of the operation button.

The game machine is provided with the accounting button (an operation button) 15 in an operation board 10 facing to a player. The operation board 10 is provided with a housing recessed part (an operation button housing recessed part) 10H, and the accounting button 15 is housed in the housing recessed part 10H in the condition that the accounting button 15 is disappeared from affront surface 10f of the operation board 10. The housing recessed part 10H is provided with an opening 10Ho for exposing a side surface 15s of the accounting button 15 from a side surface 10s of the operation board 10, and an operation surface 15t of the accounting button 15 is exposed through that opening 10Ho.