A disk cartridge includes a lower case having an opening formed thereon,
an upper case installed at the lower case to be capable of being open and
shut while pivoting, to accommodate a disk therebetween, a shutter
installed at the lower case to be capable of sliding and opening and
shutting the opening hole, a close covering member having an inclined
surface installed at the shutter to be capable of sliding, closely
contacting a non-information area disposed at an inner circumference of
the disk when the shutter is closed, and being separated from the
non-information area disposed at the inner circumference of the disk when
the shutter is open. Thus, when the shutter is closed, introduction of
dust is prevented so that the possibility of the information area of the
disk being contaminated is lowered. Also, since the disk is fixed between
the upper and lower cases, while the disk is carried, noise and damage
can be reduced.