An inexpensive optical module that avoids misalignment of optical axes and is fixed together with high reliability. Optical elements are aligned with each other and then fixed to a connecting member. The connecting member has first and second bonding surfaces. A relatively large area of the first and second bonding surfaces contacts the optical elements. The connecting member has a simple structure. This facilitates the manufacturing of the connecting member. The distance between the optical elements and the connecting member is minimized. Thus, the optical element is fixed together with high reliability.