An access control device which writes data to each of predetermined storage block sets in a storage device of which a storage area has been divided into a plurality of storage blocks. The control device includes a management information storage section and an access processing section. The management information storage section stores, for each of said storage blocks, record enable/disable information indicating whether said storage block is a non-defective block in which the data can be recorded or a defective block in which the data cannot be recorded. If the data is written to each of said storage block sets, the access processing section writes the data only to non-defective blocks in said storage block set based on the record enable/disable information stored in said management information storage section.