DRIVE DEVICE FOR ELECTRIC VEHICLE

An object of the present invention is to provide a drive device for an electric vehicle in which, by improving a supporting structure of an input shaft of a speed reduction unit, the bearing stiffness of a hub bearing is improved, while the rotational accuracy and the durability of an input shaft of a speed reduction unit are improved and noise is suppressed. In a drive device for an electric vehicle comprising: a speed reduction unit 12 including an input shaft 13 driven by an electric motor 11; a hub unit 15 rotationally driven by an output member 14 of the speed reduction unit 12; and a housing 16 accommodating the electric motor 11 and the speed reduction unit 12, wherein the input shaft 13 of the speed reduction unit 12 is supported by bearings 58 and 59 provided at two locations in the axial direction, the drive device is configured such that the bearings 58 and 59 provided at the two locations are both supported by the output member 14, and the PCD of the inboard-side hub bearing 89b of the hub bearings 89a, 89b disposed at the two locations in the axial direction of the hub unit 15 is set to be larger than the PCD of the outboard-side hub bearing 89a.