PURPOSE: To provide an optical information recording medium not causing the deterioration of recording pits even in an environment at high temp. and humidity and capable of accurately recording and reproducing information over a long period of time.

CONSTITUTION: One or both of dielectric films 31, 32 having <50nm thickness are interposed between an org. protective film 2 and a reflecting film 4 and/or between the reflecting film 4 and an org. protective film 5 so as to enhance the adhesion of the films. Since the dielectric films 31, 32 are hard, the shrinkage of the reflecting film 4 and the org. protective film 5 is inhibited.