Among discs to which data is recorded at a plurality of types of data recording densities, the disclosed optical disc has a plurality of data recording areas that record information at mutually differing data recording densities. Information regarding the data recording densities in these data recording areas is recorded to a management information recording area (a BCA area and a PIC area) in a particular format that does not depend on the data recording density of the data recording areas. Here, each data recording area is disposed divided on the same surface of the disk, or is disposed divided into a plurality of recording layers.