Fuel cell stack and separator used thereof

Membrane to the fuel cell stack is uniformly cool the cooling fluid according to the invention the electrode assembly (Membrane-Electrode assembly: MEA), and the film-generating electricity comprising a separator in which each contact disposed on both sides of the electrode assembly parts It includes, and the electric generator, the formed cooling fluid outlet manifold which cooling fluid flows in a cooling fluid inlet manifold and the cooling fluid is discharged is, the cooling fluid inlet manifold and the cooling fluid outlet manifold cooling fluid are in communication with each other through the passage of the cooling fluid flow path for moving said cooling fluid inlet manifold is formed with a protrusion, a groove which is in communication with the cooling fluid channel, in passing the cooling fluid side of the projecting portion formed at the projecting portion do. Fuel cells, the cooling fluid, the cooling fluid manifold, projections, grooves