Patent ID: 6902055

Claim:
A disk cartridge, comprising: a substantially box-shaped outer case that has an opening on one end face; and an inner case that is housed in the outer case such that the inner case can be pulled out from the opening and has a concave portion for an optical disk to be placed therein, wherein in an end portion on a side of the opening of each of an upper side plate and a lower side plate of the outer case, the outer case has a substantially V-shaped cutout formed by a substantially circular arc and a substantially straight line that is connected to the substantially circular arc and inclined with respect to sides of the outer case, the inner case has a substantially U-shaped cutout formed by a substantially circular arc in a central portion and two substantially straight lines virtually parallel to each other that are connected to the substantially circular arc and inclined with respect to sides of the inner case, the substantially straight line forming the substantially V-shaped cutout of the outer case and the two substantially straight lines forming the substantially U-shaped cutout of the inner case are virtually parallel to each other, and the inner case further includes a cover that is opposed to a bottom face of the concave portion and fitted in the substantially V-shaped cutout formed on the upper side plate of the outer case when the inner case is housed in the outer case.