Abstract: A protective envelope for a disk cartridge assembly including a disk for storage of information signals thereon and a jacket for housing said disk has a rear wall, a front wall and a cover. Each of the rear and front walls has corresponding bottom and opposite side edges joined together and unjoined top edges which form a pocket having an opening on one side thereof and dimensioned to receive at least a portion of the disk cartridge. The cover is pivotally joined to the top edge of the rear wall and is capable of pivoting between an open position to allow removal of the disk cartridge from the pocket and a closed position to enclose the entire disk cartridge within the envelope. The rear wall may be extended above the top edge of the front wall to facilitate removal of the disk cartridge from the pocket, in which case the cover, when in a closed position, extends below the top edge of the front wall.