An optical transceiver includes a case, a support, a driving member, a fastening member and a restoring member. The support is disposed on outer surface of the case. The driving member is on the support. The driving member is movable in press direction. The fastening member includes a pivot shaft, a fastening portion and a pressed portion. The pivot shaft is between the fastening portion and the pressed portion. The pivot shaft is pivoted to the support. The pressed portion has a pressed point, and the press direction is not parallel to a virtual line passing through the pressed point and the pivot shaft. When the driving member is moved to press the pressed point, the fastening member is pivoted to in fastened position or released position. The restoring member and the pressed portion are located on the side of the pivot shaft away from the second fastening portion.