Fuel cell

A fuel cell comprising stacked unit cells each including an electrolyte electrode assembly and a first separator and a second separator sandwiching the electrolyte electrode assembly, the electrolyte electrode assembly including an anode, a cathode, and an electrolyte interposed between the anode and the cathode, a fuel gas flow field for supplying a fuel gas along the anode and an oxygen-containing gas flow field for supplying an oxygen-containing gas along the cathode being formed in the unit cells, a coolant flow field for supplying a coolant along an electrode surface being formed between the unit cells at intervals of every predetermined number of the unit cells,

• wherein at least the first separator or the second separator includes a first seal surrounding the fuel gas flow field for preventing leakage of the fuel gas, a second seal surrounding the oxygen-containing gas flow field for preventing leakage of the oxygen-containing gas, and a third seal surrounding the coolant flow field for preventing leakage of the coolant;
• and
• all of the first seal, the second seal and the third seal are offset from one another when viewed from a stacking direction.