Provided are a mold allowing smooth removal of a molded article therefrom without deforming the molded article, and a method of producing the molded article using the mold. The mold includes a first mold piece (A), a second mold piece (B), and a plurality of third mold pieces (C). One of the first mold piece (A) and the second mold piece (B) has a protrusion cavity surface (2f) that protrudes toward the third mold piece (C) from a mating surface (1a) to contact with the third mold piece (C) and shapes an external profile of the molded article (Ma) together with a cavity surface (3f) of the third mold piece (C) when the mold pieces are clamped with each other.