Optical disk recording and reproducing apparatus with data recorded on wobbled grooves and lands

An optical disk recording/reproducing apparatus for recording data to and reproducing data from an optical disk engraved with a groove having a wobble waveform corresponding to a signal obtained by FM modulating a carrier serving as a rotation synchronizing signal by address information, the width of the groove being a half of a track pitch and the depth thereof being 1/6 to 1/8 of a recording/reproducing laser beam wavelength, comprising means for shifting sub-spots by a half track pitch in the disk radial direction from a main spot of a recording/reproducing laser beam, means for using a push-pull signal obtained from the main spot as a tracking error signal, means for changing a polarity of the push-pull signal and performing a tracking control at the groove center or at the land center, means for recording data on or reading data from the groove center and reading the address information from the push-pull signal of the main spot while the main spot is controlled to be at the groove center, and means for recording data on or reading data from the land center and reading the address information from the push-pull signal of a sub-spot while the main spot is controlled to be at the land center.