Patent ID: 8102087

Claim:
A drive device, comprising: a rotating electrical machine; a planetary gear unit positioned radially inside the rotating electrical machine so as to axially overlap the rotating electrical machine; a through shaft extending radially inside and through a sun gear of the planetary gear unit; and a case that accommodates the rotating electrical machine and the planetary gear unit, wherein: the through shaft is supported by the case on both axial sides of the planetary gear unit, a rotor of the rotating electrical machine is connected integrally with the sun gear and is rotatably supported at two axial positions, the rotor is radially supported at a first axial position of the two axial positions by the case directly, and the rotor is supported at a second axial position of the two axial positions at a position radially inside the sun gear by the through shaft, the rotor of the rotating electrical machine is positioned on one axial side of the planetary gear unit, and is connected to the sun gear through a rotor connecting member that extends radially inward from the rotor, the rotor connecting member has an axially protruding portion that axially protrudes to an opposite axial side of the planetary gear unit, and the rotor is radially supported by the case at the first axial position at an inner peripheral surface of the axially protruding portion of the rotor connecting member.