Fuel cell and separator thereof

A fuel cell comprising a plurality of fuel cell units, each fuel cell unit comprising:

• an electrode assembly formed by disposing electrodes on both sides of an electrolyte;
• a pair of separators that sandwich the electrode assembly in the thickness direction thereof;
• and
• gas sealing members that are disposed at an outer peripheral portion of the electrode assembly, and that seal respective reaction gas flow passages that are formed between each separator and the electrode assembly and are bounded by the separators and electrode assembly, wherein,
• at least two of the fuel cell units that are stacked in the thickness direction thereof comprise at least two electrode assemblies and at least three separators that sandwich the electrode assemblies in the thickness direction thereof,
• in each of the separators, reaction gas communication ports that penetrate the separator in the thickness direction thereof are provided outward from the gas sealing members,
• in one of the separators of each of the fuel cell units, a through path is formed that penetrates the separator in the thickness direction thereof and connects one of the reaction gas communication ports with the reaction gas flow passages, and
• the through path formed in one of the separators of one of the fuel cell units and the through path formed in one of the separators of adjacent one of the fuel cell units are offset with each other as viewed in the thickness direction of the separators.