NOVELTY - A direct-methanol fuel cell comprises: anode comprising current collector and first catalytic layer formed on the collector and into which aqueous methanol solution is introduced as fuel; cathode comprising current collector and second catalytic layer (13a) formed on collector; and electrolyte membrane. The second catalytic layer comprises catalyst, perfluoroalkylsulfonic acid polymer, and ternary metal-containing copolymer having first vinyl monomer containing organic metal complex of platinum, second and third vinyl monomers containing organic metal complexes of specific metals.    USE - As direct-methanol fuel cell (claimed).    ADVANTAGE - In a fuel cell including a cathode having the second catalytic layer, ethanol as a pollutant in an atmospheric can be decomposed by using ternary metal-containing copolymer even if ethanol flows into the fuel cell together with air as an oxidizer, when the fuel cell generates electricity. Thus, the catalyst (e.g. platinum) in the second catalytic layer can be prevented from being contaminated by ethanol and satisfactory catalytic activity can be maintained, thus making it possible to attain an improvement in generated output.    DETAILED DESCRIPTION - A direct-methanol fuel cell comprises: an anode (12) which comprises a current collector (12b,13b) and first catalytic layer (12a) formed on the current collector and into which an aqueous methanol solution is introduced as a fuel; cathode which comprises a current collector and second catalytic layer (13a) formed on the current collector, where the second catalytic layer being disposed facing the first catalytic layer and into which an oxidizer is introduced; and electrolyte membrane interposed between the anode and the cathode such that it is in contact with each catalytic layer, where at least the second catalytic layer comprises a catalyst, perfluoroalkylsulfonic acid polymer, and ternary metal-containing copolymer. The ternary metal-containing copolymer includes a first vinyl monomer containing an organic metal complex of Pt, second vinyl monomer containing an organic metal complex of M1, where M1 is a metal selected from Sn, Zn, Ni, Fe, Co, Al and Cu and a third vinyl monomer containing an organic metal complex of M2 in which M2 is ionically bonded, where M2 is Eu or La.    DESCRIPTION OF DRAWING(S) - The figure shows a sectional view showing a membrane electrode unit incorporated into the unit cell.    Membrane electrode (11)    Anode (12)    First catalytic layer (12a)    Current collector (12b,13b)    Cathode (13)    Second catalytic layer (13a)    Electrolyte membrane (14)