A method for forming a resin film is provided in which a liquid material is cured by shifting irradiation of light from a central side to an outer circumferential side of a substrate during or after spreading a liquid material on the substrate by rotation, in which the light is annular, and an inner diameter and an outer diameter of the annular light are increased concentrically in relation to a central axis of rotation as irradiation time progresses, so that the annular light shifts from the central side to the outer circumferential side of the substrate.