A reel body of a spinning reel includes: a body member having an opening on a side portion thereof; a lid member screwed to the body member so as to close the opening of the side portion of the body member; a cover member attached along the outer shape of the rear of the body member and the lid member; a nut member; and a screw member. The body member has a recessed portion and a bore portion formed such that surfaces defining the recessed portion and the bore portion open out. The recessed portion and the bore portion are connected. The nut member is non-rotatably coupled to the recessed portion. The screw member is coupled to the bore portion to be inserted into the nut member. The present invention provides a simple and inexpensive fastening structure.
