A vehicle driving device includes a case with a case body; a transmission mechanism having hydraulically controlled frictional engaging devices; an electric motor housed in the case body; and a hydraulic controller that controls oil pressure supplied to the frictional engaging devices, with the hydraulic controller disposed on an outer wall of the case body. The case body has an opening at one end of the case body that is structured to allow the transmission mechanism and the electric motor to be inserted through the opening, and an end wall portion, having a bearing part that supports an output shaft of the transmission mechanism, that is provided at another end of the case body integrally with the case body.