A method is disclosed for conducting solid printing on a tape-shaped recording medium without leaving any unprinted portions on either the sides, leading or trailing ends thereof. A portion of the image-receiving surface of a tape-shaped recording medium of a pre-determined width which is narrower than the full width is used for the actual image-receiving surface, while the other continuous portions are used as dummy image-receiving surfaces. The solid printing action involves solid printing in such a manner that the printing overlaps the edge of the image-receiving surface onto the outer dummy image-receiving surfaces. After solid printing, the center image-receiving surface portion is cut loose from peeling paper, leaving the unnecessary dummy image-receiving surfaces. The image-receiving portion cut loose may be applied to a desired surface, as a piece of printed tape-shaped printing medium solidly printed without unprinted gaps at the edges.