To put a disc storage case in a display case with a lock function for display so as not to leave the display case in a shop when a disc is rented out.

The display case K is composed of a box 33 which has a bottom wall and peripheral walls 32 each projecting from each side of the bottom wall toward the back of the bottom wall, and a lid 35 which is so attached to one side of the box 33 via proper hinges 34 as to open and close an opening of the box 33. The display case K is provided with a proper lock device B which cannot be unlocked by any individual but shop personnel, and allows the shop personnel to collect a lock part upon unlocking. The storage case A is composed of a box storing a disc, and a lid 54 which is attached rotatably to the box at both side wall ends of the box via pins inserted at both side wall ends, and which opens and closes an opening of the box. The box of the storage case A is fitted into the box 33 of the display case K in such a way that the lid 54 of the storage case A is so fitted on the lid 35 of the display case K that the hinges 34 of the display case K and the hinge pins of the storage case A are parallel with each other in close proximity.