An optical recording medium includes a body, optical information recording layer, and a cartridge. The body includes two light transmissive substrates each including a thickness not less than 50 μm; and an optical information recording layer including a thickness not less than 100 μm in thickness between said two light transmissive substrates, the optical information recording layer comprising an optical recording material, wherein information is recorded in physical change of the optical recording material by recording light; and a cartridge for enclosing the body comprising a light-shielding material including a transmittance of not greater than one percent at range of ultraviolet and visible light.