An optical module includes: an optical/electrical composite board including: a wiring board; an optical waveguide disposed on the wiring board; and a first optical path changing portion disposed at one end portion of the optical waveguide, a lens component including a lens configured to collect the light emitted from the optical path changing portion; and a fixation member fixed to the optical/electrical composite board. A through hole is formed through the lens component. The lens component is disposed on the optical/electrical composite board such that the fixation member is disposed in the through hole. A resin portion is provided in the through hole such that the fixation member is embedded in the resin portion.