Abstract: A resin molded article that has a high bond strength in a composite molded article in which a first molded article and a second molded article are integrated, and that has a stable and uniform bond strength of a composite molded article between shots of the molded article. The composite molded article includes a grooved first resin molded article containing at least a resin, a glass fiber, and a laser absorption material, and having grooves that expose the glass fiber; and a second molded article adjacently disposed on the grooved surface of the first resin molded article. In the first resin molded article, the glass fiber is added in an amount of 12-45 mass % with respect to the total mass of the resin composition that constitutes the resin molded article, the laser absorption material is added in an amount of 0.25-10 mass % with respect to the total mass of the resin composition, and the glass fiber and the laser absorption material are blended within specific blending ranges.