A vehicle drive device including a rotating electrical machine that together with an internal combustion engine serves as a driving force source for wheels, a speed change device disposed next to the rotating electrical machine in an axial direction, or a direction in which a rotation axis of the rotating electrical machine extends, and a drive device case formed by joining a first case portion accommodating the rotating electrical machine and a second case portion accommodating the speed change device, the first case portion having a first open end, which is an end that opens to an axial first direction side, or one side in the axial direction, and a first flange portion formed around the first open end and extending outward in a radial direction perpendicular to the axial direction so as to have an increased diameter, the second case portion having a second open end, which is an end that opens to an axial second direction side, or the other side in the axial direction, and a second flange portion formed around the second open end and extending outward in the radial direction so as to have an increased diameter, and the first flange portion and the second flange portion being fastened together by a fastening member to form a joint flange portion, the vehicle drive device further comprising: a rotating electrical machine control device that controls the rotating electrical machine and that is fixed to outside of one of the first case portion and the second case portion, characterized in that, the rotating electrical machine control device has a wide component and a narrow component having a smaller length in the axial direction than the wide component, the narrow component and the wide component are arranged so as to overlap each other as viewed in a specific radial direction, or a specific direction in the radial direction, and such that the narrow component is located inside in the radial direction of the wide component, the narrow component is disposed so as not to overlap the joint flange portion as viewed in the specific radial direction but to overlap the joint flange portion as viewed in the axial direction, and the wide component is disposed so as to overlap the joint flange portion as viewed in the specific radial direction but not to overlap the joint flange portion as viewed in the axial direction. a rotating electrical machine control device that controls the rotating electrical machine and that is fixed to outside of one of the first case portion and the second case portion, characterized in that, the rotating electrical machine control device has a wide component and a narrow component having a smaller length in the axial direction than the wide component, the narrow component and the wide component are arranged so as to overlap each other as viewed in a specific radial direction, or a specific direction in the radial direction, and such that the narrow component is located inside in the radial direction of the wide component, the narrow component is disposed so as not to overlap the joint flange portion as viewed in the specific radial direction but to overlap the joint flange portion as viewed in the axial direction, and the wide component is disposed so as to overlap the joint flange portion as viewed in the specific radial direction but not to overlap the joint flange portion as viewed in the axial direction.