A thermal transfer printing method for forming a screen on photographic paper without providing a margin between the screen and a screen adjacent thereto. Photographic paper is unwound from a roll and then a screen having an image is formed on the paper, by transferring yellow, magenta, and cyan colorants onto the paper using a first heating means, without providing a margin between the screen and an adjacent screen. The paper is then cut at a rear edge of the screen so as to manufacture an individual photographic paper on which the screen has been formed, which is then conveyed to a second heating means. A screen protective layer is then formed on an overall surface of the screen formed on the individual photographic paper, by thermally transferring the screen protective film onto the overall surface of the screen formed on the individual photographic paper by the second heating means.