NOVELTY - A polymer electrolyte fuel cell (PEFC) comprises a housing with an anode-side supply inlet for supplying a material for fuel; and a layered structure comprising an anode (4); a cathode (5); a polymer electrolyte membrane (3); an anode-side collector (6) containing a biochemical catalyst which decomposes the material for fuel to generate hydrogen, and having an anode side surface with conductivity; and a cathode-side collector (7). The biochemical catalyst comprises hydrogen-generative anaerobic bacteria, hydrogen-generative yeasts, and/or hydrogen-generative enzymes.    USE - For generating electricity for vehicles and small-scale houses.    ADVANTAGE - Since carbon monoxide is not generated, the poisoning of platinum or ruthenium used for the anode catalyst can be avoided. The PEFC can work at low temperatures with good efficiency and reduced size.    DETAILED DESCRIPTION - A PEFC comprises a housing with an anode-side supply inlet for supplying a material for fuel; and a layered structure situated within the housing. The layered structure comprises an anode; a cathode; a polymer electrolyte membrane; an anode-side collector containing a biochemical catalyst which decomposes the material for fuel to generate hydrogen, and having an anode side surface with conductivity; and a cathode-side collector. The biochemical catalyst comprises hydrogen-generative anaerobic bacteria, hydrogen-generative yeasts, and/or hydrogen-generative enzymes. The anode and the cathode are accommodated in the housing to sandwich the polymer electrolyte membrane. The anode-side collector is formed within the housing between the anode-side supply inlet and the anode. The anode-side collector and the cathode-side collector sandwich the anode and the cathode in-between. Spaces are provided between the anode-side supply inlet and the anode-side collector and between the anode-side collector and the anode.    DESCRIPTION OF DRAWING(S) - The figure is a schematic sectional view of a polymer electrolyte fuel cell.    Electrolyte membrane (3)    Anode (4)    Cathode (5)    Anode-side collector (6)    Cathode-side collector (7)    Aluminum positive electrode (13)    Aluminum negative electrode (14)    Silicone sheet (16)