Electric Motor

Abstract: [Problem] To provide an electric motor in which heat generated from a circuit board can be stably dissipated. [Solution] An electric motor according to one embodiment of the present invention comprises: a resin outer shell that has an opening end on one end side in the axial direction; a stator; a rotor; a metal heat sink that covers the opening end; and a circuit board that is disposed in the internal space surrounded by the resin outer shell and the heat sink and has an electronic component. The heat sink has a disk part and a protruding part protruding from the disk part toward the electronic component. The disk part has a plurality of through holes into which fastening members for fastening the heat sink and the resin outer shell are inserted. The plurality of through holes are arranged along the circumferential direction of the disk part. The protruding part has a flat tip surface that makes thermal contact with the electronic component. The tip surface has a first region facing the electronic component and a second region not facing the electronic component when viewed from the axial direction. The second region is adjacent to at least one side of the first region in the circumferential direction of the disk part.

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