To improve mountability of an electric vehicle driving device on an electric vehicle.SOLUTION: An electric vehicle driving device comprises a first electric motor 4 for supplying drive power from a first output shaft 21 extending in a vehicle length direction and a second electric motor 5 for supplying drive power from a second output shaft 22 extending in the vehicle length direction, which are located inside a pair of left and right side members 2 in an electric vehicle 10 having a chassis frame 1. Between the first electric motor 4 and the second electric motor 5, a transmission mechanism 6, which has a first transmission input shaft 23 connected to the first output shaft 21, a second transmission input shaft 24 connected to the second output shaft 22, a transmission part 25 which transmits the drive power, and a transmission output shaft 30 which outputs the drive power, is provided. Further, this device comprises a propeller shaft 7 which extends in the vehicle length direction and is connected to the transmission output shaft 30, and a differential 8 which distributes the drive power to left and right drive wheels 9.SELECTED DRAWING: Figure 3