A stator structure, comprising: a stator; a housing including a tubular section, the stator being accommodated in the tubular section; a cover coupled to the housing for blocking an upper opening of the tubular section; and a bent wire rod composed of a wire for pressing the stator against the tubular section, the bent wire rod being in contact with a top face of the stator and a rear face of the cover in a compressed state so as to be deformed along an axis substantially conforming to the central axis of the tubular section, the bent wire rod having a substantially annular shape with an opened portion when seen along the axis, and including projections projecting upward along the axis and depressions projecting downward along the axis, the projections and depressions being arranged alternately and successively, the bent wire rod being arranged such that the projections are in contact with the rear face of the cover and the depressions are in contact with the top face of the stator, the cover including a side wall formed on the rear face of the cover in a peripheral direction around the axis, and being in contact with the bent wire rod to receive an elastic force radially and outwardly relative to the axis that is generated by the bent wire rod, and a protrusion projecting from the side wall radially and inwardly relative to the axis to contact the projections and receive an upward elastic force along the axis that is generated by the bent wire rod, the protrusion being inclined downwardly along the axis radially and inwardly, and a recess in which the projections are held being provided between the protrusion and the side wall. a stator; a housing including a tubular section, the stator being accommodated in the tubular section; a cover coupled to the housing for blocking an upper opening of the tubular section; and a bent wire rod composed of a wire for pressing the stator against the tubular section, the bent wire rod being in contact with a top face of the stator and a rear face of the cover in a compressed state so as to be deformed along an axis substantially conforming to the central axis of the tubular section, the bent wire rod having a substantially annular shape with an opened portion when seen along the axis, and including projections projecting upward along the axis and depressions projecting downward along the axis, the projections and depressions being arranged alternately and successively, the bent wire rod being arranged such that the projections are in contact with the rear face of the cover and the depressions are in contact with the top face of the stator, the cover including a side wall formed on the rear face of the cover in a peripheral direction around the axis, and being in contact with the bent wire rod to receive an elastic force radially and outwardly relative to the axis that is generated by the bent wire rod, and a protrusion projecting from the side wall radially and inwardly relative to the axis to contact the projections and receive an upward elastic force along the axis that is generated by the bent wire rod, a side wall formed on the rear face of the cover in a peripheral direction around the axis, and being in contact with the bent wire rod to receive an elastic force radially and outwardly relative to the axis that is generated by the bent wire rod, and a protrusion projecting from the side wall radially and inwardly relative to the axis to contact the projections and receive an upward elastic force along the axis that is generated by the bent wire rod, the protrusion being inclined downwardly along the axis radially and inwardly, and a recess in which the projections are held being provided between the protrusion and the side wall.