NOVELTY - The base film (1) has a peripheral layer (2) which is formed in the periphery of a predetermined target area by the surface treatment material which does not have the catalyst ink (8) and affinity was provided in order to form the catalyst layer (9) in a target pattern. The catalyst layer is formed with the catalyst ink on one surface of base film main portion and is transferred to a solid polymer electrolyte membrane.    USE - Base film such as polymer film for catalyst transfer film of electrolytic membrane (claimed) used for single or stack-type polymer electrolyte fuel cell single cell mounted in fuel cell electric vehicle and domestic fuel cell. Uses include but are not limited to polymer film such as polyimide film, polyethylene terephthalate film, polyamide film, polysulphone film, polyether sulfone film, polyphenylene sulfide film, polyether ether ketone film, polyether imide film, polyallylate film and polyethylene naphthalate film.    ADVANTAGE - The peripheral layer is formed in the periphery of a predetermined target area by the surface treatment material which does not have the catalyst ink and affinity was provided in order to form the catalyst layer in a target pattern, so that the catalyst layer can be formed without suppressing the application of excess force, not producing damage to solid polymer electrolyte membrane, and producing the inferior transfer at the time of weakening a press pressure. Since ink is not discarded, the loss of catalyst ink is eliminated and reduction of manufacturing cost can be achieved.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) manufacturing method of the base film;    (2) manufacturing method of the catalyst transfer film; and    (3) electrolytic membrane.    DESCRIPTION OF DRAWING(S) - The drawing shows the schematic views illustrating the manufacturing method of catalyst transfer film.    Base film (1)    Peripheral layer (2)    Catalyst ink (8)    Catalyst layer (9)    Catalyst transfer film (10)