Fuel cell

A fuel cell formed by stacking an electrolyte electrode assembly and a 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 separator for allowing at least a reactant gas or a coolant to flow in the stacking direction,

• said separator comprising a metal plate with a seal member integrally formed on both surfaces of an outer edge of said metal plate, a rib having a frame shape being provided on said metal plate around said passage,
• wherein said rib has a rib surface which contacts another separator adjacent to said separator in the stacking direction, and the rib surface is spaced away from an inner end surface of said metal plate around said passage, toward said passage.