To provide a game machine having a case for storing a printed circuit board sufficiently dissipating heat.

A casing 2 is intarnally provided with a sub control board case 51, and a relay board case 52 connected to the sub control board case 51. The sub control board case 51 has a first case cover 57 for covering the sub control board 54, and a connector 60 directed to a first opening 65. The relay board case 2 has a second case cover 59 for covering the relay board 55 and a connector 61 directed to a second opening 65. The first and second case covers 57 and 59 are provided with first and second heat dissipation holes 64a and 65a opened into a comb-teeth shape from the circumferences of the sub control board 54 and the relay board 55 facing a component mounting face toward four sides. The first and second heat dissipation holes 64a and 65a provided in a side face abutting on each other are mutually opposed jointly.