A power supply control device that includes a switch control unit that is configured to switch on and off a first switch and a second switch and receive a supply of power from a battery, the first switch and the second switch being respectively provided in a plurality of power supply paths through which power is supplied from one end of a battery to one end of a first load and one end of a second load; an output terminal from which current that flows from the battery via the switch control unit is output; a diode whose anode is connected to the output terminal, and whose cathode is connected to one end of the second load; an opening detection circuit; and a voltage detection circuit.