A drive device (1, 1A) comprising: an electric motor (2A, 2B) that outputs drive power, and a reducer (12A, 12B) disposed between an output shaft (16A, 16B) of the electric motor (2A, 2B) and a drive axle (10A, 10B) connected to a wheel (LWr, RWr); a one-way power transmission device that transmits a one-way rotation power of the electric motor (2A, 2B) to the drive axle (10A, 10B); and a two-way power transmission device (60, 60A, 60B) that transmits a two-way rotation power of the electric motor (2A, 2B) to the drive axle (10A, 10B), wherein the one-way power transmission device and the two-way power transmission device (60, 60A, 60B) are disposed on drive power transmission passage from the electric motor (2A, 2B) to the drive axle (10A, 10B), wherein the reducer (12A, 12B) is a planetary gear reducer (12A, 12B) comprising three rotation elements (21A, 21B, 23A, 23B, 24A, 24B), the output shaft (16A, 16B) of the electric motor (2A, 2B) is connected to a first rotation element (21A, 21B), the drive axle (10A, 10B) is connected to a second rotation element (23A, 23B), and the one-way power transmission device and the two-way power transmission device (60, 60A, 60B) are connected to a third rotation element (24A, 24B), and wherein the electric motor (2A, 2B) comprises first and second electric motors disposed on the left and right sides in a vehicle width direction, the reducer (12A, 12B) comprises first and second reducers disposed on the left and right sides in the vehicle width direction, the drive power of the first electric motor is transmitted to a left wheel drive axle via the first reducer, and the drive power of the second electric motor is transmitted to a right wheel drive axle via the second reducer. an electric motor (2A, 2B) that outputs drive power, and a reducer (12A, 12B) disposed between an output shaft (16A, 16B) of the electric motor (2A, 2B) and a drive axle (10A, 10B) connected to a wheel (LWr, RWr); a one-way power transmission device that transmits a one-way rotation power of the electric motor (2A, 2B) to the drive axle (10A, 10B); and a two-way power transmission device (60, 60A, 60B) that transmits a two-way rotation power of the electric motor (2A, 2B) to the drive axle (10A, 10B), wherein the one-way power transmission device and the two-way power transmission device (60, 60A, 60B) are disposed on drive power transmission passage from the electric motor (2A, 2B) to the drive axle (10A, 10B), wherein the reducer (12A, 12B) is a planetary gear reducer (12A, 12B) comprising three rotation elements (21A, 21B, 23A, 23B, 24A, 24B), the output shaft (16A, 16B) of the electric motor (2A, 2B) is connected to a first rotation element (21A, 21B), the drive axle (10A, 10B) is connected to a second rotation element (23A, 23B), and the one-way power transmission device and the two-way power transmission device (60, 60A, 60B) are connected to a third rotation element (24A, 24B), and wherein the electric motor (2A, 2B) comprises first and second electric motors disposed on the left and right sides in a vehicle width direction, the reducer (12A, 12B) comprises first and second reducers disposed on the left and right sides in the vehicle width direction, the drive power of the first electric motor is transmitted to a left wheel drive axle via the first reducer, and the drive power of the second electric motor is transmitted to a right wheel drive axle via the second reducer.