<p>An optical information recording medium capable of high-density recording at least two times that of a current CD-R by elaborately designing the shape of a pre-groove, wherein a recording layer is provided on a translucent substrate in which a spiral pre-groove is formed, a track pitch Tp of the pre-groove is 1.0 mu m≤Tp≤1.2 mu m, and an angle of inclination Ga of the side wall of the pre-groove is 30 DEG≤Ga≤70 DEG .</p>
