A brake control device of an electric vehicle, comprising: a master cylinder that produces a master cylinder pressure in accordance with a driver's operation; a wheel cylinder (4FL,4FR,4RL,4RR) that is provided by each of front and rear road wheels to apply each road wheel with a hydraulic braking force in accordance with a wheel cylinder (4FL,4FR,4RL,4RR) pressure; a brake fluid pressure actuator that is arranged between the master cylinder and the wheel cylinders (4FL,4FR,4RL,4RR) and includes a hydraulic pump driven by a pump motor and a differential pressure regulating valve (25,26) that controls a pressure difference between the wheel cylinder (4FL,4FR,4RL,4RR) pressure and the master cylinder pressure under operation of the pump motor; a regenerative braking force control means that is connected to a vehicle drive electric motor connected to the drive road wheels and controls a regenerative braking force produced by the vehicle drive electric motor; a regenerative cooperative brake control means that carries out such a control as to achieve a driver-desired deceleration based on the sum of a base hydraulic pressure part produced by the master cylinder pressure and a regenerative part produced by the regenerative braking force and compensates an insufficient regenerative part with a pressure increased part produced by the brake fluid pressure actuator; and characterised by a differential pressure regulating valve operation control means that, upon stopping of the pump motor due to the regenerative cooperative brake control, carries out the pressure difference control of the differential pressure regulating valve (25,26) from the time when, under the regenerative cooperative brake control, the pump motor is deenergized to the time when rotation of the motor is stopped, in accordance with a speed reduction characteristic of the pump motor, wherein after stopping of the pump motor, the differential pressure regulating valve control means carries out the pressure difference control of the differential pressure regulating valve (25,26) in such a manner as to increase the pressure difference between the wheel cylinder pressure and the master cylinder pressure in accordance with a lowering of the motor rotation speed of the pump motor, and after stopping of the pump motor, the differential pressure regulating valve control means carries out the pressure differential control in such a manner as to keep the wheel cylinder pressure to the level, which has been kept before the stopping of the pump motor, in accordance with the characteristic of the motor speed reduction of the pump motor. a master cylinder that produces a master cylinder pressure in accordance with a driver's operation; a wheel cylinder (4FL,4FR,4RL,4RR) that is provided by each of front and rear road wheels to apply each road wheel with a hydraulic braking force in accordance with a wheel cylinder (4FL,4FR,4RL,4RR) pressure; a brake fluid pressure actuator that is arranged between the master cylinder and the wheel cylinders (4FL,4FR,4RL,4RR) and includes a hydraulic pump driven by a pump motor and a differential pressure regulating valve (25,26) that controls a pressure difference between the wheel cylinder (4FL,4FR,4RL,4RR) pressure and the master cylinder pressure under operation of the pump motor; a regenerative braking force control means that is connected to a vehicle drive electric motor connected to the drive road wheels and controls a regenerative braking force produced by the vehicle drive electric motor; a regenerative cooperative brake control means that carries out such a control as to achieve a driver-desired deceleration based on the sum of a base hydraulic pressure part produced by the master cylinder pressure and a regenerative part produced by the regenerative braking force and compensates an insufficient regenerative part with a pressure increased part produced by the brake fluid pressure actuator; and characterised by a differential pressure regulating valve operation control means that, upon stopping of the pump motor due to the regenerative cooperative brake control, carries out the pressure difference control of the differential pressure regulating valve (25,26) from the time when, under the regenerative cooperative brake control, the pump motor is deenergized to the time when rotation of the motor is stopped, in accordance with a speed reduction characteristic of the pump motor, wherein after stopping of the pump motor, the differential pressure regulating valve control means carries out the pressure difference control of the differential pressure regulating valve (25,26) in such a manner as to increase the pressure difference between the wheel cylinder pressure and the master cylinder pressure in accordance with a lowering of the motor rotation speed of the pump motor, and after stopping of the pump motor, the differential pressure regulating valve control means carries out the pressure differential control in such a manner as to keep the wheel cylinder pressure to the level, which has been kept before the stopping of the pump motor, in accordance with the characteristic of the motor speed reduction of the pump motor.