Abstract: The present invention discloses a stacker for a tray feeder including: a plurality of frames for forming an outer portion of the stacker; an elevator capable of moving upwardly and downwardly and positioned at a side of an auxiliary frame of the plurality of frames; a driving means for driving the elevator; and a magazine for receiving the tray plates and mounted to the elevator. According to the present invention, the tray plate on which the electronic parts is positioned is precisely mounted by the magazine having the alignment bars due to operation of the stacker, and safely transferred to a predetermined position, to improve productivity and reliability.