The width and/or depth of guide grooves on the disc substrate surface are
changed in each data recording layer and the guide groove depth of the
recording film layer is appropriately shaped in each data recording layer
to provide a high density, high recording capacity optical disc. The
optical disc has plural substrate layers each having plural guide
grooves; plural data recording layers laminated on the substrate layers,
each of the plural data recording layers having a recording film for
recording data over the guide grooves; and an intermediate layer between
the plural data recording layers. The guide groove width is different on
each substrate layer. The guide grooves of the data recording layers
formed according to the guide grooves of the substrate layer have the
same pitch in each data recording layer.