A game machine includes: a cable capable of transmitting electric power and data signal; one or more function modules which are connected to the cable and are configured to perform a predetermined function respectively; and a main controller which generates data signal for controlling the function modules and transmits the generated data signal and electric power supplied from outside to the function modules via the cable. Since data signal such as image signal or audio signal and electric power are combined and are then transmitted via one cable, the data signal wiring and the electric power wiring between the main controller and the function module of a game machine can be unified as one, so wiring can be simplified. Accordingly, manufacturing and maintenance become easy and cost for the same can also be saved.