Abstract: An optical fiber transceiver includes: a cartridge, formed with two opposite sidewalls and a front end thereof disposed with an insertion part, wherein each sidewall is transversally formed with a runner; and a sliding member, formed with a pair of extending arms inserted in the pair of runners, wherein bottom ends defined at front portions of the pair of extending arms are connected via a connecting sheet, and rear ends thereof are protrudingly disposed with a pair of unlocking flanges; wherein, a top surface of the connecting sheet and a bottom surface of the insertion part are oppositely disposed with an elastic member and an abutting unit, two sides of the elastic member have a pair of elastic arms, and two sides of the abutting unit respectively have a guiding part symmetrically arranged and allowing each elastic arm to be in contact and displaced thereon.