A method of forming an image, having the steps of: superposing a heat-sensitive transfer sheet on a heat-sensitive transfer image-receiving sheet having a lenticular lens and at least one receptor layer on a transparent support; and applying thermal energy in accordance with image signals from a thermal head, wherein the heat-sensitive transfer image-receiving sheet has a subbing layer which contains a resin that is identical with at least one resin constituting the lenticular lens, on the side of the transparent support opposite to the side on which the lenticular lens is provided, wherein the heat-sensitive transfer image-receiving sheet has the receptor layer containing a latex polymer on the subbing layer and a spherical indenter hardness after the subbing layer and the receptor layer are provided is less than that of the transparent support itself, and wherein the thermal head has a specific length.