An electric vehicle control device having a motor drive circuit for driving a vehicle drive motor using power of a battery, a battery monitoring unit for monitoring a state of the battery, and a main CPU for controlling the motor drive circuit, the electric vehicle control device comprising: a contactor provided on a plus-side line between the battery and the motor drive circuit so as to be opened and closed in response to an instruction of the main CPU, the contactor having a first terminal connected to the battery and a second terminal connected to the motor drive circuit, a BMU power supply device configured to lower an output voltage of the battery for the battery monitoring unit; a down-regulator configured to lower the output voltage of the battery to a value suitable for an input to a CPU power supply device which generates and supplies a control voltage Vcc for the main CPU; wherein the down-regulator has a first input connected to the first terminal of the contactor so as to receive a first battery voltage directly from the battery, the down-regulator has a second input connected to the second terminal of the contactor, said second terminal being indirectly connected to the battery and being also connected to the output side of a charger circuit, wherein the vehicle control device further comprises a main switch configured to open and close a passage through which a voltage of a control power is input to the down-regulator, wherein the control power for the down-regulator is generated by the BMU power supply device, and wherein an output of the BMU power supply device is input to the down-regulator through the main switch as control power, wherein the motor drive circuit, the battery monitoring unit, the main CPU, the BMU power supply device, the down-regulator, and the contactor are mounted on a single board to configure a control module. a contactor provided on a plus-side line between the battery and the motor drive circuit so as to be opened and closed in response to an instruction of the main CPU, the contactor having a first terminal connected to the battery and a second terminal connected to the motor drive circuit, a BMU power supply device configured to lower an output voltage of the battery for the battery monitoring unit; a down-regulator configured to lower the output voltage of the battery to a value suitable for an input to a CPU power supply device which generates and supplies a control voltage Vcc for the main CPU; wherein the down-regulator has a first input connected to the first terminal of the contactor so as to receive a first battery voltage directly from the battery, the down-regulator has a second input connected to the second terminal of the contactor, said second terminal being indirectly connected to the battery and being also connected to the output side of a charger circuit, wherein the vehicle control device further comprises a main switch configured to open and close a passage through which a voltage of a control power is input to the down-regulator, wherein the control power for the down-regulator is generated by the BMU power supply device, and wherein an output of the BMU power supply device is input to the down-regulator through the main switch as control power, wherein the motor drive circuit, the battery monitoring unit, the main CPU, the BMU power supply device, the down-regulator, and the contactor are mounted on a single board to configure a control module.