An electronic device capable of decreasing power consumption is provided. A multiple function apparatus including a power line communication function has a plurality of units such as a PLC board, a main control board, a printer control board, a printer, and a FAX control board. The multiple function apparatus also includes a device power supply unit for supplying power to the units independently. A power supply control unit of the PLC board outputs a power supply control signal in response to a state change of the multiple function apparatus and controls power supply to each unit.