To make all components of a pack main body housing a peel-apart type instant film unit of plastics.

An upper case 52, a film pressing plate 53, and a bottom cover 54 are constituted of plastic moldings. A pair of wing piece 62 is integrated with the bottom plate part 60 of the bottom cover 54, and a control piece 65 is integrated with a film unit ejecting port side. The pair of wing piece 62 is pressed by the leaf spring of a pack holder used at the same time when the film pack is used. The wing pieces 62 enter inside a notch 55 formed on the side wall of the upper case 52, and push the plate 53 up through the lower edge of a side plate part 58. Thus, the positioning of the film pack inside the pack holder and that of the film unit inside a pack main body are performed.