An optical disc includes a plurality of lands and grooves alternately
arranged in a radial direction of the optical disc, each land wobbling in
the radial direction and recording a header recording part for holding
address information, there being a difference in elevation between each
land and each groove, each grove having a data recording part for storing
data, wherein the header recording parts offset alternately for
respective lands in the radial direction, the data recording part in the
groove and the header recording part in the land are arranged offset in a
circumferential direction of the optical disc, and the header recording
part in each land enables the same address information to be reproduced
for two groove at both sides of each land.