Optical module

An optical module comprising:

• a substrate having an optical waveguide being formed in a surface layer;
• a semiconductor optical device in which an active layer, a first electrode, and a mirror are integrated, the mirror changing an optical path of light emitting from the active layer toward a side of the substrate;
• a sub-mount having a first wiring pattern formed on one surface thereof and on which the semiconductor optical device is surface mounted such that the first electrode faces the first wiring pattern;
• a spacer mounted on the substrate apart from a region where the light enters the side of the substrate, having an upper surface on a side opposite the substrate, and having a second wiring pattern formed on the upper surface;
• and
• a wire,
• wherein the sub-mount is mounted on the spacer,
• wherein the first wiring pattern on the sub-mount faces part of the second wiring pattern on the spacer and is electrically connected thereto, and
• wherein the second wiring pattern on the spacer includes a pad being disposed in a region exposed from the sub-mount and being bonded to the wire.