To provide a stator wherein though a one-way clutch of ratchet structure is provided, a stator total unit weighs not so heavy, manufacture of a part is relatively easy, a sound generated at operation time is relatively small.

In one end in an axial direction of a cylindrical part, an annular plate part 6 is integrally formed toward the diametric direction inward, in an inner side end face 6b of the plate part 6, a resin or aluminum-made inner cylinder 1 provided with a notched part 8, a pocket plate 11 arranged rotatably in an internal peripheral side of the cylindrical part so as to be opposed in an axial direction to the plate part 6 to be provided with a pocket part 14 in a surface 11a opposed to the plate part 6, strut 17 received able to protrude and sink in the pocket part 14 to be engaged in one rotational direction relating to the notched part 8, and a reinforcing material 9 mounted in a part with a load acting at engaging time of at least one-way clutch 4 of the inner side end face 6b of the plate part 6 to consist of a metal plate, are provided.