An object is to easily convey by suction an optical module equipped with optical fibers having ends coupled to optical receptacles and mount the optical module on a substrate. An optical module according to the present invention includes an optical device to which optical fibers having ends coupled to optical receptacles are optically coupled and also includes a carrier composed of a substrate and adhesive layers formed on the upper and lower surfaces of the substrate. The optical device is bonded on the adhesive layer formed on the lower surface of the substrate. Part of the optical fibers and the optical receptacles are bonded on the adhesive layer formed on the surface of the substrate.