Patent ID: 8318380

Claim:
A fuel cell in form of a solid polymer fuel cell, comprising: an electrolyte; a hydrogen-side electrode layer provided on one side of the electrolyte and having a hydrogen-gas consuming face at which hydrogen gas is consumed; an air side electrode layer provided on the other side of the electrolyte and having an oxidizing-gas consuming face at which oxidizing gas is consumed; a first separator provided adjacent to the hydrogen-gas consuming face; a second separator provided adjacent to the oxidizing-gas consuming face; a fuel gas supply plate that has a plurality of through holes and is located between the first separator and the hydrogen side electrode layer; a first gas passage portion that is located between the first separator and the fuel gas supply plate; and a second gas passage portion that is located between the fuel gas supply plate and the hydrogen-side electrode layer, wherein the first gas passage portion and the second gas passage portion each have a porous portion permeable to a reaction gas, and a pressure loss per unit length of the porous portion of the second gas passage portion is smaller than a pressure loss per unit length of the porous portion of the first gas passage portion, when the first gas passage portion and the second gas passage portion are provided with gas at a same flow rate, to disperse nitrogen gas in the second passage.