An optical disc apparatus for use with an optical disc including on its tracks pairs of servo pattern areas to be recorded with an address pit pattern by using data patterns, each of which indicates a relative track number of the recording track, being repeated in a predetermined cycle; the servo area comprising a pair of wobble pits each being disposed off the center of the recording track in opposite direction with one another, a clock pit disposed on the center of the track and address pit pattern consisting of a plurality of pits disposed on the center of the recording track for indicating relative track number;an optical pick-up device;a relative address detection means to identify the relative track number of the track to which the optical pick-up is accessing and for outputting detected relative address signal; andan address/speed detection means for receiving the relative address signal outputted by the relative address detection means, and detecting an absolute track number of the track to which the optical pick-up is accessing and a travel speed of the optical pick-up device moving across the recording tracks.