to carry out a track control by compensating for an offset caused by a radial tilt when a track control of a main beam is carried out by detecting tracking information provided at a reference layer of a spatial recording medium by a guide beam , there are formed a first mark pair row aligned with the first mark pairs in a radius direction by a track pitch , and other mark pair row aligned with the second mark pairs in the radius direction by the track pitch . the other mark pair row is arranged in the radius direction by being shifted from the first mark pair row by a prescribed distance . the track control is made to be able to carry out by dispensing with an uncontrollable region by selecting one of plural track error signals generated from the plural mark pairs .