PURPOSE: To improve the efficiency of the recycle work of a film unit with a lens.

CONSTITUTION: Bar code display 26 having information, such as a kind of a film unit with a lens, is printed on a paper box 2 for armor. Further, the back cover part 28 of the paper box 2 is stuck to paste margin pieces 17a, 17b, and 19 in which perforations 24 are formed to cover a box type unit body therewith. After recovery, the film unit with a lens has a display part 26 formed thereto and read by a scanner and assorted classified by a kind. In the assorted film units with a lens, by removing the paste margin pieces 17a, 17b, and 19 from the perforations 24, the unit body can be easily taken out from the paper box 2.