Patent ID: 8158233

Claim:
An optical information recording medium comprising: N information layers, where N is a natural number of 2 or more; and an intermediate layer for separating the N information layers optically from each other, wherein with the N information layers being referred to as a first information layer to an N-th information layer sequentially from an optical beam incident side, an L-th information layer included in the N information layers includes a recording layer on which information can be recorded by irradiation with an optical beam, a reflective layer, and a transmittance adjusting layer in this order from the optical beam incident side, where L is at least one natural number that satisfies 1≦L≦N−1, and the transmittance adjusting layer contains tungsten (W), oxygen (O), and M1, where the M1 is at least one element selected from the group consisting of Ce and Ti.