PURPOSE: To use a sprocket for the detection of the feeding of one frame and to obtain a film unit with a lens having a compact mechanism part, at a low cost by forming each of specific first and second perforation groups on a

CONSTITUTION: The first perforation group F2 that plural perforations are pierced in one frame of a photographic picture and the second perforation group F3 in which one perforation is pierced in one frame of the photographic picture are formed on both side edge parts in the width direction of the film respectively. In the unit, the first perforation group F2 is used for the charging of a shatter, the sending of a counter and the detection of the feeding of one frame. Thus, the sprocket can be used for the charging of the shatter, the sending of the counter and the detection of the feeding of one framellinked with the feeding of the film by the first perforation group F2, so that the film unit with the lens of the compact mechanism part can be provided at the low cost.