NOVELTY - Fuel cell (I), comprises: an anode (12) comprising a current collector and a catalyst layer (12a) formed on the current collector, where an aqueous methanol solution is introduced as fuel; a cathode (13) comprising a current collector and a catalyst layer formed on the current collector, where an oxidizing agent is introduced; and an electrolyte membrane (14) interposed between the catalyst layer of the anode and the catalyst layer of the cathode.    USE - Used as a fuel cell.    ADVANTAGE - (I): limits the movement of the catalyst microparticles supported by the carbon particles efficiently, hence the transfer of the catalyst microparticles from the carbon particles can be limited or prevented in an efficient manner and the limiting can be maintained for a long period of time; and provides improved electricity generation.    DETAILED DESCRIPTION - Fuel cell (I), comprises: an anode (12) comprising a current collector and a catalyst layer (12a) formed on the current collector, where an aqueous methanol solution is introduced as fuel; a cathode (13) comprising a current collector and a catalyst layer formed on the current collector, where an oxidizing agent is introduced; and an electrolyte membrane (14) interposed between the catalyst layer of the anode and the catalyst layer of the cathode, where the catalyst layer of at least one of the anode and the cathode contains carbon particles having pores on the surface of it, catalyst microparticles supported by these carbon particles, perfluoroalkylsulfonic acid polymer, a high-molecular compound having a repeating unit of a high-molecular chain fixed to the surface of the carbon particles, where the catalyst microparticles are finer than the carbon particles, and the repeating unit of a high-molecular chain has a redox potential of 1.3 V or more.    DESCRIPTION OF DRAWING(S) - The figure shows a sectional view showing a film electrode unit incorporated into the unit cell.    Film electrode unit (11)    Anode (12a) Catalyst layer (12)    Cathode (13)    Electrolyte membrane (14)