Abstract: A jig for use in washing optical elements. The jig is arranged to receive and hold a plural number of optical elements, which are formed by polishing and cutting into predetermined unit lengths a plural number of glass rods adhesively fixed on a polishing tray, and then heating the polishing tray to kill adhesive power of an adhesive agent bonding the optical elements to the polishing tray. The jig is in the form of a pallet which is constituted by a base member and a cover member of similar grid-like forms, which are closable one on the other in an overlapped state and fixable to each other to form therebetween rows of nesting pockets for securely holding therein rows of optical elements in the same positional relations as on said polishing tray. The base and cover member of the pallet are provided with openings on the opposite sides of the nesting pockets to bring the respective optical elements into contact with a cleaning liquid.