Drive device

A drive device for a vehicle, comprising:

• a motor case configured to house a motor;
• a first case configured to house a gear unit that is mechanically connected with the motor;
• and
• a second case configured to house an electric power conversion unit that is electrically connected with the motor, wherein
• the first case and the second case are fastened to the motor case by a plurality of fastening members,
• the plurality of fastening members includes at least one common fastening member that concurrently fastens the first case and the second case to the motor case,
• the second case is disposed on the first case, at a position of the at least one common fastening member,
• the first case includes a first flange that extends along an outer periphery of the first case and that is fixed to the motor case by some of the plurality of fastening members,
• the second case includes a second flange that extends along an outer periphery of the second case and that is fixed to the motor case by some of the plurality of fastening members,
• a part of the first flange includes an overlap section that is positioned between the motor case and the second flange, and
• the at least one common fastening member includes at least one first common fastening member that is positioned at the overlap section.