DISK CARTRIDGE

PROBLEM TO BE SOLVED: To prevent deviation of upper half and lower half when these are fixed with a small screw to reduce the number of parts and simplify the work by providing as the in-low structure at least a part of the protection wall of the external surrounding portions of the upper half and lower half and of the external circumferences of the upper half and lower half disk media. SOLUTION: The external surrounding portions 1A, 2A of the upper half and lower half and external circumference protection walls 1B, 2B of upper half and lower half disk media are completed in various in-low structure in place of the butting structure of the related art. With this structure, deviation of the upper half 11 and lower half 12 clue to torsional stress generated by screwing of the screws of the upper half and lower half of the related art can be prevented perfectly. Moreover, a clamping plate at the lower part of the shutter of the shutter slider body structure is integrally provided as a part of the upper half 11 and/or lower half 12 to reduce the number of parts and simplify the work.