An optical recording medium includes a substrate, a protective layer,
three or more information recording layers formed between the substrate
and the protective layer and transparent intermediate layers each formed
between neighboring information recording layers and capable of recording
data in the three or more information recording layers and reproducing
data recorded in the three or more information recording layers by
projecting a laser beam onto the three or more information recording
layers via a light incidence plane constituted by the surface of either
the substrate or the protective layer, wherein neighboring transparent
intermediate layers facing each other across an information recording
layer have different thicknesses. According to the thus constituted
optical recording medium, it is possible to reduce interlayer cross-talk.