An optical module includes a light-forming part and a protective member. The light-forming part includes a base member; semiconductor light-emitting devices mounted on the base member; lenses mounted on the base member and configured to convert, in terms of spot size, light emitted from the semiconductor light-emitting devices; and light-receiving devices that are mounted on the base member, that are disposed, in the emission directions of the semiconductor light-emitting devices, between the semiconductor light-emitting devices and the lenses, and that are configured to directly receive light from the semiconductor light-emitting devices.