Film pack holder

A film pack holder comprising:

• a main body of a holder;
• a lid which is attached at the main body of the holder in such a manner to open and close freely and wherein an opening for photographing is formed;
• a film pack at which a slide is attached in such a manner to move back and forth freely and shields sheet film units which are piled to be stored therein from light, when the slide is closed;
• a slide frame which is incorporated in the main body of the holder and is provided in such a manner to move back and forth freely with respect to the main body of the holder, and wherein the film pack is set;
• a nail portion which is provided at the main body of the holder and is engaged with the slide to move when the slide is moved;
• a display mechanism provided at the main body of the holder for indicating that a preparation for photographing is completed in connection with the movement of the nail portion;
• a regulating member which is abutted against the nail portion for regulating the movement of the nail portion;
• and
• a releasing member which is pushed by the film pack and retracts the regulating member from the nail portion so as to release the regulation by the regulating member when the film pack is set.