FUEL CELL

A fuel cell of the present invention is disclosed that includes a catalysis layer constituting a fuel supply side electrode. The catalysis layer is composed of a catalyst, an electrically conductive substance, a hydrogen-ion conductive electrolytic substance, and a carbon monoxide oxidizer. As the carbon monoxide oxidizer, for example, a transition metal oxide, chloride, or hydride is used. Alternatively, a metal complex containing water as a ligand can also be used as the carbon monoxide oxidizer.