To prevent the adhesion of dirt to an instant film discharged as well as to prevent light fog due to the penetration of outside light.

A light shielding flap 20 is produced by dry laminating using a transparent polyethylene terephthalate (PET) sheet 22 with a black printed layer 21 formed on one face and a black PET sheet 23. A heat sealable layer 24 has been formed on the black PET sheet 23 and this layer 24 is bonded to a case body to cover an outlet. When printing is carried out in a camera, the light shielding flap 20 is pressed on the front edge of a film unit and bent. Though the film unit is discharged while in contact with the flap 20, dirt does not adhere to the film unit during discharge because the contact face of the flap 20 is the black PET sheet 23.