A disk-shaped optical information recording medium comprising a recording
layer, a pressure sensitive adhesive layer or an adhesive layer, and a
cover sheet in this order on a substrate, and having a central hole, a
track pitch of 300 to 600 nm and a groove depth of 40 to 150 nm, for
recording and playing back information by being irradiated with a laser
light at a wavelength of 500 nm or less, wherein the substrate and the
cover sheet are closely adhered via the pressure sensitive adhesive layer
or the adhesive layer at a region including a portion of an inner
circumference vicinity and an outer circumference vicinity, and the
maximum value for the radial length of the closer adhesion region is at
least 0.4 mm.