Motor unit

A motor unit comprising:

• a rotor that includes a shaft rotatable around a rotation axis;
• a stator;
• a bearing that rotatably holds the shaft;
• a housing that accommodates the rotor, the stator, and the bearing, and has an opening on an axial one side;
• a cover that closes the opening and is fixed to the housing;
• and
• an annular member that has an annular shape when viewed from an axial direction and is provided independently from the bearing,
• wherein the cover includes
• an accommodation portion that protrudes from an axial one side outer face to an axial one side, is recessed from an axial other side outer face to the axial one side, and accommodates the annular member,
• one or more ribs that protrude from the axial one side outer face of the cover to the axial one side, and are disposed radially outward of the accommodation portion when viewed from the axial direction, and
• one or more fixing points fixed to the housing,
• the one or more ribs extend outward from the accommodation portion, and
• when viewed from the axial direction, for at least one of the ribs, the fixing point is formed on an extension line extending outward from the at least one rib in a direction in which the at least one rib extends.