Abstract: A vehicle roof rack can be made by insert molding so that the outside is coated with synthetic resin. The support bracket cores can be manufactured easily, shape and dimensional precision can be easily controlled, and reinforcing ribs can be provided while avoiding appearance defects and supplying resin to the mold from a gate on only one side. The core used for insert molding includes the rail core member of the roof rack and the core of the support bracket for mounting the roof rack to the vehicle. The support bracket core is synthetic resin, manufactured as an integral molding having pilot holes through which screws are passed for attaching the support bracket core to the rail core, and mounting bolts for mounting the support brackets and roof rack to the vehicle.