Patent ID: 7883814

Claim:
A fuel cell formed by stacking an electrolyte electrode assembly and a first separator in a stacking direction, said electrolyte electrode assembly including a pair of electrodes and an electrolyte interposed between said electrodes, a passage extending through said first separator for allowing at least a reactant gas or a coolant to flow in the stacking direction, said first separator comprising a metal plate with a seal member integrally formed on both surfaces of an outer edge of said metal plate, a first rib having a frame shape being provided on said metal plate around said passage, wherein said first rib has a rib surface which extends in a direction perpendicular to the stacking direction, at least a part of the rib surface being in contact with a second rib on a second separator adjacent to said first separator in the stacking direction, the part of the rib surface that is in contact with the second rib having a first end that is nearest to the passage and a second end that is spaced away from an inner end surface of said metal plate around said passage, toward said passage.