To provide an instant photographic film unit constituted so that an image plane part does not have a level difference in thickness and blur or a black point is not caused around an image plane frame.

This film unit is a mono-sheet type instant photographic film unit where the periphery part of a photosensitive material laminating body consisting of an image receiving sheet, a photosensitive layer unit and a photographic developer enclosing body is sealed from the inside or the outside, and has the image plane frame printed in a pattern on an image receiving sheet supporting body.