Patent ID: 7588809

Claim:
A resin hollow body comprising: a pair of primary semi-hollow bodies formed by primary injection molding, whose open ends are butted with butt ends thereof so as to define a joining space on an outer periphery of the butt ends; and a secondary molding portion formed by injecting a molten resin by secondary injection molding so as to fill between the butt ends to thereby unite the pair of primary semi-hollow bodies into a single body, wherein the butt ends are formed along inner peripheral sides of the open ends of each semi-hollow bodies, wherein the resin is interposed between the butt ends and extrudes from the butt ends to an inner side of the resin hollow body, and wherein the resin between the butt ends and the resin that extrudes from the butt ends to the inner side of the resin hollow body is continuously connected along the inner peripheral sides of each semi-hollow body.