This brake device is provided with: a brake actuator which applies to a wheel a brake torque depending on the rotation of an electric motor; a booster circuit which boosts a reference voltage outputted from a battery; and a motor control unit which controls the electric motor. Depending on the state of the booster circuit, the motor control unit switches between a first drive process for driving the electric motor by supplying thereto a boost voltage, which is a voltage that has been boosted by the booster circuit, and a second drive process for driving the electric motor by supplying a reference voltage to the electric motor and by performing spark advance control.