PURPOSE: To smoothly guide a photographic film in a prescribed locus regardless of presence or absence of the back tension of this photographic film.

CONSTITUTION: The bottom end position of a roller 52 exists on an extension line from an insertion port and on the tangent of the normal moving locus (arc locus) of an attachment plate 42. This attachment plate 42 is eventually moved in arc in the state of maintaining contact with the bottom end of the roller 52 and the warpage deformation occurring in the back tension acting on a negative film 12 is prohibited. The front end of the attachment plate 42 surely faces the insertion port of a cartridge 14 and can smoothly enter the inside of this cartridge 14 together with the negative film 12.