PURPOSE: To prevent the switching of the torque of a motor due to abrupt change in number of revolutions of a motor when drive wheels slip or lock.

CONSTITUTION: Necessary output operating means 2 of an electric motor vehicle when loads a plurality of motors 20 calculates necessary traveling output in response to traveling conditions detected by traveling condition detecting means 1, and shared output setting means 3 sets shared outputs to be shared by the motors. The shared outputs normally are set at each time of detecting the conditions, and command means 4 outputs a command signal to the motors based on it. In this case, when malfunction detecting means 5 detects the malfunction state of the number of revolutions of the motor, new shared output is not set by state holding means 6 while the malfunction state exists, and the output of the command signal to the motor is held in a previous state. Thus, even if the number of revolutions of the motor is abruptly changed due to tire slip, etc., the shared output is not immediately changed, but a stable driving state is maintained.