Abstract: A chip tray, comprising: a first plate configured to allow a plurality of semiconductor elements to be placed thereon, a positioning and clamping mechanism for pressing and holding the semiconductor elements in predetermined locations on the first plate, and actuator means for actuating the positioning and clamping mechanism comprising movable parts of the positioning and clamping mechanism which can be actuated simultaneously to perform a pressing and holding operation and a releasing operation by the positioning and clamping mechanism simultaneously for all the semiconductor elements, wherein the positioning and clamping mechanism comprises a second plate which is laterally shiftable and lockable with respect to the first plate and comprises a plurality of openings and of elastic members each corresponding to an opening and each provided with a pressure piece adapted for abutting against at least one edge of one of the semiconductor elements, characterized in that wherein the elastic members are self-guidin