Abstract: Provided is an optical module having high efficiency in optical coupling to a functional element on a substrate. An optical module includes: a first optical waveguide disposed parallel to a substrate; a condensing mirror configured to reflect and condense light propagated in the first optical waveguide toward the substrate; a second optical waveguide formed in a tapered shape narrowed toward the substrate, the second optical waveguide guiding the light reflected by the condensing mirror to the vicinity of the surface of the substrate; and an optical function unit disposed on the substrate such that the light emitted from the second optical waveguide is incident on the optical function unit.