A resin molded product includes a primary molded object molded by a primary molding die, and a secondary molded object formed to be integrated with the primary molded object by a secondary molding die, the secondary molding die including a shared molding die which shares a part of the primary molding die. The primary molded object includes a rotation regulation portion making a mutual concave-convex fit engagement at a joint portion between the primary molded object and a molding surface of the shared molding die and regulating rotation and shift of the primary molded object in circumferential directions about a center axis of the primary molded object.
