A direct drive motor (10, 10A, 10B, 10C) comprising: a bearing including an inner ring and an outer ring arranged to face each other in a relatively rotatable manner, and a plurality of rolling elements interposed between the inner ring and the outer ring in a rollable manner; a motor unit including a stator and a rotor rotatable around a rotation axis with respect to the stator; and a housing including: a first housing supported by the inner ring and to which the stator is fixed; and a second housing supported by the outer ring and to which the rotor is fixed, wherein the inner ring is sandwiched in the axial direction of the rotation axis by the first housing and an inner ring holder connected to the first housing, the second housing includes: a flange portion protruding in a radial direction from an inner peripheral surface of the second housing and extending toward one end surface side in an axial direction of the outer ring; and a retaining ring arranged at the other end surface side in the axial direction of the outer ring, the flange portion and the retaining ring sandwiching the outer ring therebetween, and characterised in that a push ring (55, 155, 255) formed of a polymeric resin material that is a thermoplastic resin or a thermosetting resin is provided in a gap between the flange portion and the one end surface in the axial direction of the outer ring, or a gap between the retaining ring and the other end surface in the axial direction of the outer ring, absorbs width dimensional tolerance of the bearing and the retaining ring in the axial direction, and prevents the bearing from moving in the axial direction relative to the second housing. a bearing including an inner ring and an outer ring arranged to face each other in a relatively rotatable manner, and a plurality of rolling elements interposed between the inner ring and the outer ring in a rollable manner; a motor unit including a stator and a rotor rotatable around a rotation axis with respect to the stator; and a housing including: a first housing supported by the inner ring and to which the stator is fixed; and a second housing supported by the outer ring and to which the rotor is fixed, wherein the inner ring is sandwiched in the axial direction of the rotation axis by the first housing and an inner ring holder connected to the first housing, the second housing includes: a flange portion protruding in a radial direction from an inner peripheral surface of the second housing and extending toward one end surface side in an axial direction of the outer ring; and a retaining ring arranged at the other end surface side in the axial direction of the outer ring, the flange portion and the retaining ring sandwiching the outer ring therebetween, and characterised in that a push ring (55, 155, 255) formed of a polymeric resin material that is a thermoplastic resin or a thermosetting resin is provided in a gap between the flange portion and the one end surface in the axial direction of the outer ring, or a gap between the retaining ring and the other end surface in the axial direction of the outer ring, absorbs width dimensional tolerance of the bearing and the retaining ring in the axial direction, and prevents the bearing from moving in the axial direction relative to the second housing.