A method for manufacturing an optical module equipped with an optical element includes the steps of: (a) preparing a support member for supporting an optical element; (b) providing a spacer on the supporting member; (c) pressing the spacer to cause a plastic deformation therein; (d) bonding the optical element and the spacer; (e) providing a sealing member on an upper surface of the supporting member; (f) disposing a lid member for sealing the optical element above the sealing member and affixing the lid member to the supporting member; and (g) affixing a case with a lens onto the supporting member, wherein, in the step (g), the case with the lens is affixed to the supporting member such that the lens is disposed on an optical path of light oscillated by the optical element, and the case with the lens is disposed opposite in an optical axis direction of light passing through the lens to and in contact with the supporting member.