Fuel cell

A fuel cell comprising:

• an electrolyte electrode assembly including a pair of electrodes and an electrolyte interposed between said electrodes;
• and
• a pair of separators for sandwiching said electrolyte electrode assembly,
• wherein a reactant gas supply passage and a reactant gas discharge passage extend through said fuel cell in a stacking direction of said fuel cell;
• a reactant gas flow field is connected between said reactant gas supply passage and said reactant gas discharge passage on said separator along a surface of said electrode;
• a seal structure is provided between said electrolyte electrode assembly and said separator, around at least one of said electrode, said reactant gas supply passage, and said reactant gas discharge passage;
• said seal structure includes a seal joint and at least first and second seal members connected to said seal joint;
• an interior angle at said seal joint defined by central lines of said first and second seal members is in a range of 40° to 90°;
• and
• said seal joint has a straight portion and a curved portion forming a y-shaped joint, wherein the curved portion originates at a non-terminal location of the straight portion and curves away from the straight portion of said seal joint.