PURPOSE: To obtain good printing without any trouble such as wrinkles, etc., on soft thin films by a method in which a soft thin film is temporarily bonded through an adhesive layer to the surface of a supporter having good printability and a desired printing is applied to the film.

CONSTITUTION: An adhesive layer 3 is formed on a printing medium 1 (e.g., coated paper, metal plate, hard thick synthetic plate, etc.) having good printability, and then a soft thin film 4 is temporarily bonded with the adhesive layer 3. A printing is applied on the soft thin film 4, and the film 4 is peeled off from the adhesive layer 3. In this case, a releasing layer 2 of a silicon resin, etc., is formed as needed. Good printing without any trouble, e.g., wrinkles, adsorption to expandible blanket or plate cylinder, etc. can thus be obtained.