To provide a curved face forming method by which both of the spherical face and the aspherical face can be machined with high shape accuracy without prolonging a machining time and a tool mark is eliminated so as not to raise any problems, and also to provide a die for molding a lens manufactured by using the curved face forming method, and a lens.

When the curved face is formed on the material surface by annularly cutting the material surface by relatively rotating a cutting tool and a material 10 for a die, the following processes are executed, that is, a tracing process, in which the curved face is formed by intermittently moving the position of the cutting tool on the material surface along a tracing point string α for tracing the shape of the curved face to be formed, and a post-machining process in which the tool mark generated on the curved face during the tracing process is eliminated by intermittently moving the position of the cutting tool on the material surface along post-machining point strings β, γ... set to a position deviated from the tracing point string α.