Disk cartridge having shutter operation portions which do not obstruct access to a medium whether shutter members are at a closed position or an open position
   
   

A shutter opening/closing member of a drive device, which slides a shutter and opens and closes a window portion, does not interfere with a recording/playback head. A shutter operation portion extends, in a sliding direction of the shutter, from a main body portion of the shutter which moves at a region of the window portion. When a disk cartridge is inserted into the drive device, a shutter opening/closing pin member of the drive device operates the shutter operation portion and makes the shutter slide. Both when the shutter has closed the window portion and when the shutter has opened the window portion, the shutter operation portion is positioned outside of the region of the window portion. Thus, the shutter opening/closing pin does not encroach on the region of the window portion, and does not interfere with the recording/playback head.

 
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