Fuel cell

A fuel cell comprising:

• a plurality of unit cell structures, each unit cell structure including a cell structure including an anode, a cathode and an electrolyte membrane, the anode and the cathode being laminated on opposite sides of the electrolyte membrane, respectively;
• a pair of separators disposed on both surfaces of the cell structure with gas passages being defined by the separators and the cell structure for circulating two types of gas for power generation;
• and
• a plurality of at least partially porous ribs disposed between each of the separators and the cell structure, at least part of the porous ribs being disposed successively on an entire cross-section of the gas passage in a transverse direction with a flow direction of the gas such that the gas flows through the plurality of bodies of the at least partially porous ribs for power generation, the porosity of each rib defining a non-linear gas flow path through a majority of the body of the rib, and adjacent ribs in the gas flow direction being spaced from one another in the gas flow direction, at least one rib contacting at least four different ribs in the gas flow direction and adjacent ribs being spaced from one another in the transverse direction to the gas flow direction.