An optical information recording medium which makes it possible to reduce
the noise level, improve the C/N ratio and store record data for a long
time period. An optical information recording medium has a recording
layer formed on a substrate, for having a laser beam irradiated thereto
for recording and reproduction of record data. The recording layer
includes a first sub-recording film and a second sub-recording film. The
first sub-recording film is formed of a first material containing Si as
the main component. The second sub-recording film is formed of a second
material containing Al as the main component and having Au added thereto,
and disposed in the vicinity of the first recording film. The laser beam
is irradiated to the recording layer via a light transmitting layer
formed in a manner covering the recording layer side.