A vehicle comprising: two electric motors (2A, 2B) configured to output driving forces to right and left drive shafts (10A, 10B) independently, respectively; planetary gear reducers (12A, 12B) disposed on power transmission paths between the drive shafts (10A, 10B) and the electric motors (2A, 2B); a one-way power transmitting device disposed between first rotation elements (24A, 24B) of the planetary gear reducers (12A, 12B) and a reducer case that accommodates the planetary gear reducers (12A. 12B) therein so as to transmit one-way rotational power; a brake (60A, 60B) that connects/disconnects the first rotation elements (24A, 24B) and the reducer case, and configured to transmit two-way rotational powers of the electric motors (2A, 2b) to the drive shafts (10A, 10B) in a connection state; a running state estimator which estimates a running state of the vehicle; a torque calculator which calculates torques of the two electric motors (2A, 2B); and a controller which controls the brake (60A, 60B) based on the running state of the vehicle estimated by the running state estimator, and characterized in that, when the vehicle runs forward and both the two electric motors (2A, 2B) power the vehicle, the controller is configured to release the brake (60A, 60B), and when the vehicle runs forward and both the two electric motors (2A, 2B) perform regenerative braking, the controller is configured to actuate the brake, when the vehicle runs forward and one of the two electric motors (2A, 2B) powers the vehicle while the other motor (2A, 2B) performs regenerative braking, the controller is configured to release or actuate the brake (60A, 60B) based on a power driving torque of said one of the two electric motors (2A, 2B) that powers the vehicle and a regenerative braking torque of the other motor (2A, 2b) that performs regenerative braking. two electric motors (2A, 2B) configured to output driving forces to right and left drive shafts (10A, 10B) independently, respectively; planetary gear reducers (12A, 12B) disposed on power transmission paths between the drive shafts (10A, 10B) and the electric motors (2A, 2B); a one-way power transmitting device disposed between first rotation elements (24A, 24B) of the planetary gear reducers (12A, 12B) and a reducer case that accommodates the planetary gear reducers (12A. 12B) therein so as to transmit one-way rotational power; a brake (60A, 60B) that connects/disconnects the first rotation elements (24A, 24B) and the reducer case, and configured to transmit two-way rotational powers of the electric motors (2A, 2b) to the drive shafts (10A, 10B) in a connection state; a running state estimator which estimates a running state of the vehicle; a torque calculator which calculates torques of the two electric motors (2A, 2B); and a controller which controls the brake (60A, 60B) based on the running state of the vehicle estimated by the running state estimator, and characterized in that, when the vehicle runs forward and both the two electric motors (2A, 2B) power the vehicle, the controller is configured to release the brake (60A, 60B), and when the vehicle runs forward and both the two electric motors (2A, 2B) perform regenerative braking, the controller is configured to actuate the brake, when the vehicle runs forward and one of the two electric motors (2A, 2B) powers the vehicle while the other motor (2A, 2B) performs regenerative braking, the controller is configured to release or actuate the brake (60A, 60B) based on a power driving torque of said one of the two electric motors (2A, 2B) that powers the vehicle and a regenerative braking torque of the other motor (2A, 2b) that performs regenerative braking. planetary gear reducers (12A, 12B) disposed on power transmission paths between the drive shafts (10A, 10B) and the electric motors (2A, 2B); a one-way power transmitting device disposed between first rotation elements (24A, 24B) of the planetary gear reducers (12A, 12B) and a reducer case that accommodates the planetary gear reducers (12A. 12B) therein so as to transmit one-way rotational power; a brake (60A, 60B) that connects/disconnects the first rotation elements (24A, 24B) and the reducer case, and configured to transmit two-way rotational powers of the electric motors (2A, 2b) to the drive shafts (10A, 10B) in a connection state; a running state estimator which estimates a running state of the vehicle; a torque calculator which calculates torques of the two electric motors (2A, 2B); and a controller which controls the brake (60A, 60B) based on the running state of the vehicle estimated by the running state estimator, and characterized in that, when the vehicle runs forward and both the two electric motors (2A, 2B) power the vehicle, the controller is configured to release the brake (60A, 60B), and when the vehicle runs forward and both the two electric motors (2A, 2B) perform regenerative braking, the controller is configured to actuate the brake, when the vehicle runs forward and one of the two electric motors (2A, 2B) powers the vehicle while the other motor (2A, 2B) performs regenerative braking, the controller is configured to release or actuate the brake (60A, 60B) based on a power driving torque of said one of the two electric motors (2A, 2B) that powers the vehicle and a regenerative braking torque of the other motor (2A, 2b) that performs regenerative braking.