An object of the present application is to provide an infrared imaging lens at a lower cost than before.
An infrared imaging lens (10) comprises, in order from an object side, a first lens (L1) formed of silicon whose minimum transmittance of infrared rays with a wavelength of 8µm to 13µm is at least 40% for a thickness of 1mm, and a second lens (L2) formed of chalcogenide glass. The silicon whose minimum transmittance of infrared rays with a wavelength of 8µm to 13µm is at least 40% for a thickness of 1mm can be obtained at low cost for example by controlling the oxygen concentration in CZ method.