Abstract: A magnetic tape container for use in combination with a magnetic tape duplicating apparatus in which a long, endless, master magnetic tape is circulated to produce many duplicates of the master magnetic tape. The magnetic tape container has most of the long, endless, master magnetic tape in a zigzag fashion for circulating the master magnetic tape through the magnetic tape duplicating apparatus. The magnetic tape container is comprised of a tape case, a feed mechanism having a capstan disposed near the entrance of the tape case, a pinch roller mounted for free rotation on a swing lever being brought into contact with the capstan or retracted from the capstan, provided with at least one annular air guide groove in the circumference thereof. A first tape guide is disposed near the capstan, and a second tape guide is disposed near the pinch roller opposite to the first tape guide to form a gap between the first tape guide and the second tape guide.