To obtain a lightweight foamed molding for photosensitive material which has superior size precision without any deterioration in photographic property by using paper resin of (51:49) to (75:25) in the constitution ratio of cellulose fiber sourced from paper and fully thermoplastic resin and efficiently foaming the paper resin having more nonfoamed components than resin components contributing to foaming.

The molding for photosensitive material is characterized in that paper resin pellets which are of (51:49) to (75:25) in the constitution mass ratio of the cellulose fiber derived from paper and the fully thermostatic resin and contain at least one kind of dispersion improving agent are used and supercritical fluid is mixed with resin in a cylinder to carry out a foaming injection molding.