To control power supply from a battery while a vehicle is stopped due to ignition-off operation so that automatic stop control of an engine may be performed highly reliably.

In the power supply control device for controlling the power supply to electrical equipment of the vehicle that executes the automatic stop control of the engine, the power is supplied from a first battery when the ignition switch is turned off so as to stop the engine, and from a second battery when the engine is stopped due to the automatic stop control. However, if automatic stop forbidding conditions are established when the ignition switch is turned off, the power is supplied to the electric equipment from the second battery. Therefore, the power consumption of the second battery during a stop of the engine can be optimized, and it is possible to stop the engine without being restricted by the remaining capacity of the second battery while the vehicle is stopped.