An optical recording medium having at least a recording layer 11 and a light transmitting layer 13 formed on a substrate 10, in which the recording layer 11 is made of an organic material for absorbing an incident light of wavelength of 360 nm to 460 nm, and inducing physical change or chemical change to vary the refractive index, the light transmitting layer 13 is 10 m to 177 m in thickness, the relation between absorption coefficient "k" and pyrolysis temperature T_dec of organic material is

and the absorption coefficient "k" is k0.0.