Provided is a magnetic disk loading apparatus making it easy to perform the work of replacing a magnetic disk unit or any other component with a new one or the work of maintaining or inspecting it, and accommodating a larger number of magnetic disk units. A magnetic disk loading apparatus comprises magnetic disk units stored in a disk enclosure, and a cable container located in a place within the disk enclosure other than the place where the magnetic disk unit is located. The magnetic disk loading apparatus is designed so that the disk enclosure can be inserted into or pulled out of the magnetic disk loading apparatus from the front side of the magnetic disk loading apparatus. Cables contained in the cable container are coupled to the magnetic disk unit, and encased in a cable guide that can be bent or stretched along with the insertion or the pulling-out of the disk enclosure.