NOVELTY - A fuel cell has separators (28), each comprising a sandwiching section (36), where fuel gas inlet (38) for supplying fuel gas to fuel gas channel (40), a fuel gas discharge channel (42) for discharging the fuel gas after consumption in the fuel gas channel, and a detour path forming wall (44), which contacts an anode, for preventing the fuel gas from flowing straight from the fuel gas inlet to the fuel gas discharge channel are provided in the sandwiching section.    USE - Used as solid oxide fuel cell for forming fuel cell stack used in stationary and mobile applications, e.g. for mounting on a vehicle.    ADVANTAGE - The fuel cell makes it possible to suitably and reliably supply a fuel gas along an electrode surface of an anode, and improves the fuel gas utilization ratio by consuming the fuel gas efficiently in power generation reaction. It is possible to prevent oxidation due to the entry of the exhaust gas or the oxygen-containing gas into the anode from the outside of the electrolyte electrode assembly, thus it is possible to prevent the power generation efficiency from being lowered due to oxidation, and improve durability of the separators and the electrolyte electrode assemblies.    DETAILED DESCRIPTION - A fuel cell is formed by stacking an electrolyte electrode assembly (26) and separators (28). The electrolyte electrode assembly comprises an anode, a cathode, and an electrolyte interposed between the anode and cathode. It is sandwiched between the separators, each comprising a sandwiching section (36) having a fuel gas channel (40) for supplying a fuel gas along an electrode surface of the anode and an oxygen-containing gas channel for supplying an oxygen-containing gas along an electrode surface of the cathode, separately; a bridge connected to the sandwiching section, and having a reactant gas supply channel for supplying the fuel gas to the fuel gas channel or supplying the oxygen-containing gas to the oxygen-containing gas channel; and a reactant gas supply unit connected to the bridge, a reactant gas supply passage for supplying the fuel gas or the oxygen-containing gas to the reactant gas supply channel extending through the reactant gas supply unit in a stacking direction, where fuel gas inlet (38) for supplying the fuel gas to the fuel gas channel, a fuel gas discharge channel (42) for discharging the fuel gas after consumption in the fuel gas channel, and a detour path forming wall (44), which contacts the anode, for preventing the fuel gas from flowing straight from the fuel gas inlet to the fuel gas discharge channel are provided in the sandwiching section. The sandwiching section includes an annular protrusion (46) protruding on the side of the fuel gas channel to contact an outer circumferential region of the anode; and projections (48) protruding on the side of the fuel gas channel to contact the anode.    DESCRIPTION OF DRAWING(S) - The drawing is an exploded perspective view showing the fuel cell.    Electrolyte electrode assembly (26)    Separators (28)    Sandwiching section (36)    Fuel gas inlet (38)    Fuel gas channel (40)    Fuel gas discharge channel (42)    Annular protrusion (46)    Projections (48)