To provide an optical recording reproducing medium with a high recording density, in particular a high recording density medium adopting the land groove recording system that is configured to suppress a cross track of a recording signal, obtains a sufficiently greater push-pull signal amplitude and a stable tracking servo so as to enhance the recording density.

In the optical recording and reproducing medium wherein grooves are formed along recording tracks and emission of a light with a prescribed wavelength λ records and/reproduces information, the grooves comprise a first groove 2 and a second groove 3 shallower than the first groove, and the second grooves 3 are placed side by side on both the sides of the first groove 2.