MEMORY DISK STORAGE CASE

PROBLEM TO BE SOLVED: To enable repeated use with less pollution of a memory disk to be stored inside by storing a disk holder to arrange and store a plurality of memory disks with prescribed intervals so that their axes are approximately aligned with each other in a condition where outer cases are closely attached to each other. SOLUTION: A disk holder 10 in which hard disks 15 are stored is stored in a lower case 12. An upper case 11 in which a cap 53 is turnably assembled by a bearing 54 is softly covered on the lower case 12, and a groove of the upper case 11 and a projected bar 47 of the lower case 12 are telescopically fitted to each other to join them in a sealed condition. A part of a circular opening comprising semi-circular notches 41, 48 at each side end of the upper and lower cases 11, 12 is covered by a cap 53. The cap 53 is turned by a pin around the bearing 54, and a claw 58 of a projected piece 57 is joined with a step 59 of the lower case 12. As a result, sealability of a whole disk holder 10 is secured to achieve the excellent dust-proof function.