FUEL CELL

A fuel cell includes an electrolyte layer; a fuel-side electrode to which fuel is supplied; and an oxygen-side electrode to which oxygen is supplied, the fuel-side electrode and the oxygen-side electrode being disposed to face each other with the electrolyte layer sandwiched therebetween. The electrolyte layer is an anion exchange membrane. The fuel-side electrode contains cobalt and nickel. The fuel includes a compound containing at least hydrogen and nitrogen. The proportion of the nickel content relative to total moles of cobalt and nickel in the fuel-side electrode is 70 mol% or less.