Patent ID: 7722973

Claim:
A fuel cell comprising: a solid electrolyte membrane having ion conductivity; a fuel electrode disposed on one side of the solid electrolyte membrane and having an anode catalyst layer to which a fuel component of a liquid fuel is supplied; an air electrode disposed on the other side of the solid electrolyte membrane and having a cathode catalyst layer; a fuel electrode side casing which is provided so as to cover the rear surface side of the fuel electrode, a fuel tank for storing a liquid fuel being formed between the fuel electrode side casing and the rear surface of the fuel electrode; and an air electrode side casing which is provided so as to cover the rear surface side of the air electrode, an air chamber for storing air being formed between the air electrode side casing and the rear surface of the air electrode, wherein a plurality of inlet ports for introducing air into the air chamber are provided in the air electrode side casing, and fins for promoting heat dissipation are formed on an outer surface of the air electrode side casing, wherein the fins are constituted of a plurality of rib-like projections arranged parallel to each other, and the plurality of inlet ports are formed so as to penetrate each of the projections.