NOVELTY - The method involves forming (AA) electrode pattern on the surface of the non-electroconductive sheet using the electrode material that contains electroconductive particle. The negative electrode and positive electrode are printed (DD) on the electrode pattern using predetermined oxidoreductase. The non-electroconductive sheet is bent, in which negative electrode and positive electrode formed, so that negative electrode and positive electrode opposes through non-electroconductive sheet. The negative electrode contains oxidase, oxidized coenzyme, or coenzyme oxidase.    USE - Method for manufacturing fuel cell e.g. bio-fuel cell for electronic device (all claimed) such as mobile telephone, mobile device, robot, personal computer, game machine device, vehicle equipment. Can also be used in domestic electrical appliance, industrial commodity, moving bodies such as motor vehicle, two-wheeled vehicle, aircraft, rocket, and spacecraft, and medical devices such as testing equipment, pacemaker, and in-vivo apparatus.    ADVANTAGE - The manufacturing and disposing processes of fuel cell are simple, and design changes of fuel cell can be achieved effectively. The size of the fuel cell can be reduced efficiently. Thus the motive power source for electronic devices can be achieved effectively. The earth-leakage in fuel cell can be eliminated efficiently, thus the efficiency and performance of fuel cell can be enhanced effectively.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) a fuel cell; and    (2) an electronic device.    DESCRIPTION OF DRAWING(S) - The drawing shows a flowchart illustrating the method for manufacturing fuel cell. (Drawing includes non-English language text)    Step for forming electrode pattern on surface of non-electroconductive sheet (AA)    Step for printing negative electrode and positive electrode on electrode pattern (DD)    Step for cutting non-electroconductive sheet (EE)    Step for bending non-electroconductive sheet (FF)    Step for forming fuel tank (GG)