NOVELTY - A fuel cell (11) comprises an oxygen-containing gas supply unit (74) serving as a passage for oxygen-containing gas before consumption and extending in a stacking direction, for supplying the oxygen-containing gas to an oxygen-containing gas channel (70); and a fuel gas channel (46) having an end point connected to a fuel gas discharge channel (61) for emitting fuel gas consumed within an electrolyte electrode assembly (26) to the oxygen-containing gas supply unit, from a position that is spaced outwardly from an outer circumference of the electrolyte electrode assembly.    USE - Used as a solid oxide fuel cell for forming a fuel cell stack for a fuel cell system used in stationary and mobile applications, e.g. for mounting on a vehicle.    ADVANTAGE - The fuel cell has a simple structure, in which it is possible to reliably prevent an excessive increase in the temperature of the exhaust gas, to prevent a non-uniform temperature distribution in the fuel cell stack, and to effectively prevent damage to the electrolyte electrode assembly and the separator, improving power generation performance. The fuel cell has a compact structure, where influence of heat distortion can be avoided and heat efficiency is achieved.    DETAILED DESCRIPTION - A fuel cell formed by stacking an electrolyte electrode assembly and a separator (28), where electrolyte electrode assembly includes an anode, a cathode, and an electrolyte interposed between the anode and cathode, comprises a fuel gas channel for supplying a fuel gas along a surface of the anode and formed on one surface of the separator; an oxygen-containing gas channel for supplying an oxygen-containing gas along a surface of the cathode and formed on the other surface of the separator; a fuel gas supply channel provided on one surface or on the other surface of the separator, and connected to a fuel gas supply unit, serving as a passage for the fuel gas, before consumption and extending in a stacking direction, and further connected to a fuel gas inlet for supplying the fuel gas into the fuel gas channel; and an oxygen-containing gas supply unit serving as a passage for the oxygen-containing gas before consumption and extending in the stacking direction, for supplying the oxygen-containing gas to the oxygen-containing gas channel. The fuel gas channel has an end point at a position corresponding to an outer circumferential portion of the electrolyte electrode assembly, where end point is connected to a fuel gas discharge channel for emitting the fuel gas consumed within the electrolyte electrode assembly to the oxygen-containing gas supply unit, from a position that is spaced outwardly from an outer circumference of the electrolyte electrode assembly. An INDEPENDENT CLAIM is included for a fuel cell stack.    DESCRIPTION OF DRAWING(S) - The figure is an exploded perspective view showing a fuel cell of the fuel cell stack.    Fuel cell (11)    Electrolyte electrode assembly (26)    Separator (28)    Fuel gas channel (46)    Fuel gas discharge channel (61)    Oxygen-containing gas channel (70)    Oxygen-containing gas supply unit (74)