An optical information recording medium of the invention has at least two information
layers. A first information layer (100) disposed at the front side (viewed
from a laser incident side) includes at least a reflection layer (3), a
recording layer (6) disposed at the laser incident side with respect to
the reflection layer (3), for generating a reversible change between an
amorphous phase and a crystalline phase that can be detected optically by applying
a laser beam, and a dielectric layer (50) disposed between the reflection
layer (3) and the recording layer (6). The dielectric layer (50)
contains at least Zr, Si and Cr, a ratio of Zr, Si and Cr of the dielectric layer
(50) at the reflection layer side is expressed as Zr:Si:Cr=p:q:r (p+q+r=100),
a ratio of Zr, Si and Cr of the dielectric layer (50) in the vicinity of
the interface at the recording layer side is expressed as Zr:Si:Cr=s:t:u (s+t+u=100),
and ru or tq.