A master model of a lens array and a method of manufacturing the same are provided, which can make it possible to manufacture the master model in a relatively short time with a simple construction of an apparatus. In a master model of a lens array on which a plurality of lens portions is arranged, a plurality of members corresponding to lenses having curved surfaces formed in the same shape as lens surfaces of the lens portions is arranged in the same lines as those of the plurality of lens portions in the lens array and is connected in a body.