To provide an information recording medium, etc., capable of facilitating the solidification of a photosetting adhesive layer without requiring photoirradiation of high power, greatly improving quality and productivity accordingly and simultaneously improving durability.

This recording medium consists of a tightly adhered structure obtd. by providing the medium with two substrates 101, 102 which have information recording surfaces 11, 12 on their oneside surfaces and are discretely formed with light reflection layers 13, 14 on these information recording surfaces 11, 12 and disposing these two substrates 101, 102 opposite to each other, then sticking the substrates to each other via the photosetting adhesive layer 16. The light reflection layer 13 of at least one substrate 101 of the two substrates 101, 102 is formed of a light selective light reflection layer having high transmittance to light of a prescribed wavelength.