An instant film pack comprising: a plurality of instant film units each having a developer pod which contains a developer; a film cover having stiffness higher than that of the instant film unit; and a case that accommodates the plurality of instant film units and the film cover laminated on top of each other, and includes a discharge port from which the instant film unit or the film cover is discharged, wherein the film cover includes: a cover member that is overlapped in front of the instant film unit positioned in the foremost layer, accompanying prevention ribs that are arranged in parallel with a discharge direction in a case where the film cover is discharged from the discharge port and prevent the instant film unit positioned in the next layer from being discharged together with the film cover in a case where the film cover is discharged through the discharge port, and a pair of first light shielding ribs that is arranged in parallel with each other in a width direction perpendicular to the discharge direction, the accompanying prevention ribs and the first light shielding ribs are formed on a front surface of the cover member, and the accompanying prevention rib tilts so as to gradually increase from a distal end of the film cover in the discharge direction toward a proximal end; wherein the accompanying prevention rib tilts at a tilt angle of 7° to 30° with respect to the cover member. a plurality of instant film units each having a developer pod which contains a developer; a film cover having stiffness higher than that of the instant film unit; and a case that accommodates the plurality of instant film units and the film cover laminated on top of each other, and includes a discharge port from which the instant film unit or the film cover is discharged, wherein the film cover includes: a cover member that is overlapped in front of the instant film unit positioned in the foremost layer, accompanying prevention ribs that are arranged in parallel with a discharge direction in a case where the film cover is discharged from the discharge port and prevent the instant film unit positioned in the next layer from being discharged together with the film cover in a case where the film cover is discharged through the discharge port, and a pair of first light shielding ribs that is arranged in parallel with each other in a width direction perpendicular to the discharge direction, a cover member that is overlapped in front of the instant film unit positioned in the foremost layer, accompanying prevention ribs that are arranged in parallel with a discharge direction in a case where the film cover is discharged from the discharge port and prevent the instant film unit positioned in the next layer from being discharged together with the film cover in a case where the film cover is discharged through the discharge port, and a pair of first light shielding ribs that is arranged in parallel with each other in a width direction perpendicular to the discharge direction, the accompanying prevention ribs and the first light shielding ribs are formed on a front surface of the cover member, and the accompanying prevention rib tilts so as to gradually increase from a distal end of the film cover in the discharge direction toward a proximal end; wherein the accompanying prevention rib tilts at a tilt angle of 7° to 30° with respect to the cover member.