| 摘要 |
PROBLEM TO BE SOLVED: To enable the recognition as to whether a disk being housed in a cartridge was taken out to the outside of the cartridge in the past or not, while having the same shape of the cartridge as that of the conventional one. SOLUTION: The cartridge 1 is furnished with an opening window 7 for recording on the disk 2 and a shutter 8 for opening a cover of the opening window 7, and also is furnished with an opening part 3 which is capable of taking out the disk 2 outward from the inside, on the surface different from the surface constituting the opening window 7, and a holding part 5 covering the opening part 3 is fixed by adhesive tapes 4 which are instructing parts. When the adhesive tapes 4 are peeled off and the holding part 5 is removed, the disk 2 is allowed to be taken out to the outside, and also since the adhesive tapes are peeled out, the fact that the holding part 5 was already removed once, is thereby recognized.
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