SEAT BELT RETRACTOR

A seat belt retractor includes a housing including a pair of side walls facing each other, a winding drum configured to wind up a webbing, the winding drum being housed between the pair of side walls so as to be rotatable in a winding direction and a pull-out direction of the webbing, a lock member provided at a first end portion, of the winding drum, located on one side in an axial direction of the winding drum, a biasing member including one end portion attached to the first end portion of the winding drum, the other end portion attached to the lock member, and a connecting portion connecting the one end portion and the other end portion, a shaft member attached to the first end portion of the winding drum, and a cover member attached to the housing.