An information recording medium with high recording sensitivity and superior repeat overwriting capability. The information recording medium (15) comprising at least recording layer (104) recording and/or reproducing information through irradiation with a laser beam or application of an electric current, and second dielectric layer (106) on substrate (14), wherein the second dielectric layer (106) comprises M1 (provided that M1 is at least one element selected from Sc, Y, La, Gd, Dy and Yb) and O.