| 摘要 |
PROBLEM TO BE SOLVED: To provide a recording disk body (disk cartridge) that can be made to be small and mass, and a disk cartridge that uses the recording disk body. SOLUTION: A recording disk 9 having a recording surface on one side and a hub 10 supporting a surface being the opposite side from the recording surface of the recording disk 9 or the recording surface side and also having a spindle inserting part are provided, and the mostinner diameter (D1) in a recording area 18 of the recording disk 9 is not longer than the outer diameter (D2) of the hub 10. |
