An optical information recording medium has tolerance to warping. The
optical information recording medium includes at least one information
recording layer on a main surface of a substrate and a light-transmitting
layer. The substrate includes a clamp area and an information recording
area in accordance with the information recording layer. In the
light-transmitting layer, the average thickness of a second area
corresponding to the clamp area is thinner than the average thickness of
a first area corresponding to the information recording area.