POWER SUPPLY DEVICE OF VEHICLE

A power supply device of a vehicle includes a power storage device (110) that can be charged by receiving power from outside the vehicle, an inlet (702) to which a charging connector (901) is connected, a connector connection detection circuit (712) that detects whether the charging connector (901) is connected to the inlet (702), a charging relay (707) that connects the power storage device (110) to the inlet (702), and an ECU (300) that controls the connector connection detection circuit (712) and the charging relay (707). The ECU (300) performs an operation confirmation to determine whether the connector connection detection circuit (712) normally detects the connection of the charging connector (901) in the state in which the charging connector (901) is connected to the inlet (702) and the charging relay (707) is in the OFF state.