NOVELTY - The cell has an exhaust flow path (50) exhausting reaction gas existing between a landing portion (22) and a gas diffusion layer (16) of a separator (20). A three dimensional structure mesh layer (40) is formed among the separator and the gas diffusion layer. Multiple metal wires are perpendicularly intersected and arranged on the mesh layer, where a mesh size of the mesh layer is formed smaller than a landing portion width of the separator. A space part is formed in the exhaust flow path, where a diameter of a horizontal line and perpendicular line is 0.3 mm or less.    USE - Fuel cell.    ADVANTAGE - The cell prevents over-compression about the gas diffusion layer by surface pressure concentration at the landing portion of the separator, avoids an electrolyte film from being pricked by carbon fiber of the gas diffusion layer and ensures endurance enhancement of the electrolyte film. The cell decreases constant resistance and heat generation on channel section of the separator so as to prevent the electrolyte film from being dried. The cell improves diffusion of the reactive gas between the landing portion and the gas diffusion layer so as to ensure smooth product water exhaustion and improves cooling process. The gas diffusion layer is infiltrated towards the channel section of the separator so as to prevent inter-cell performance declination. The cell eliminates need of a super fine molding to be combined with the three-dimensional mesh so as to ensure productivity improvement of the separator, improves lifetime of the separator and obtains productivity improvement of the gas diffusion layer. The cell prevents reaction gas and product water from being locked in the three dimensional structure mesh layer so as to facilitate even diffusion of the reaction gas and removal of water.    DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of a fuel cell.'(Drawing includes non-English language text)'    Gas diffusion layer (16)    Separator (20)    Landing portion (22)    Three dimensional structure mesh layer (40)    Exhaust flow path (50)