A resin-molded component includes a first molding part, and a second molding part. A portion of the first molding part and a portion of the second molding part are laminated in a direction of connecting an outer surface and an inner surface of the resin-molded component to provide a laminated portion. A portion of the second molding part is provided as an exposed portion. Each of portions of the laminated portion is located at least on opposite sides across the exposed portion. A one-side surface of the exposed portion in the laminating direction of the laminated portion is configured as a portion of the outer surface and the other-side surface thereof is configured as a portion of the inner surface.