Grip, molding method and molding apparatus therefore

An attachment portion is formed of a synthetic resin material integrally with both ends of a grip body formed of a synthetic resin. A pair of concave portions opposed to each other are provided on an outer peripheral surface of a resin layer forming a hollow portion provided through gas injection in an almost central part in longitudinal direction of the grip body, thereby reducing a volume of the hollow portion and increasing a thickness of the resin layer to enhance a rigidity.