To obtain an optical module that suppresses the occurrence of loss of propagation of an output laser beam.SOLUTION: An optical module 1 includes a multi-emitter semiconductor laser bar 2 including a plurality of light emitting points, and a lens unit 5 including a collimating lens array 4 for parallelizing a plurality of beams output by a multi-emitter semiconductor laser bar 2. The lens unit 5 further includes a holding member 6 that holds the collimating lens array 4. The direction of warpage of the collimating lens array 4 on a plane that is orthogonal to the propagation directions of the plurality of beams and that includes the collimating lens array 4 is the same as the direction of warpage of a line connecting the plurality of light emitting points on a plane that is orthogonal to the propagation directions of the plurality of beams, and includes the plurality of light emitting points.SELECTED DRAWING: Figure 1