A fuel cell module comprising: a fuel cell stack formed by stacking a plurality of fuel cells for generating electricity by electrochemical reactions of a fuel gas and an oxygen-containing gas; a reformer for reforming a mixed gas of a raw fuel chiefly containing hydrocarbon and water vapor to produce the fuel gas supplied to the fuel cell stack; an evaporator for evaporating water, and supplying the water vapor to the reformer; a heat exchanger for raising a temperature of the oxygen-containing gas by heat exchange with a combustion gas, and supplying the oxygen-containing gas to the fuel cell stack; an exhaust gas combustor for combusting the fuel gas discharged from the fuel cell stack as a fuel exhaust gas and the oxygen-containing gas discharged from the fuel cell stack as an oxygen-containing exhaust gas to produce the combustion gas; and a start-up combustor for combusting the raw fuel and the oxygen-containing gas to produce the combustion gas, wherein the evaporator includes an annular water supply chamber to which the water is supplied, an annular water vapor discharge chamber to which the water vapor is discharged, a plurality of evaporation pipes each having one end connected to the water supply chamber and another end connected to the water vapor discharge chamber, and a combustion gas channel for supplying the combustion gas between the evaporation pipes; and an evaporation return pipe is provided that connects the water vapor discharge chamber and an inlet of the reformer and is a passage of the water vapor, characterized in that a raw fuel pipe is inserted into the evaporation return pipe for allowing the raw fuel to flow from a downstream side to an upstream side of the evaporation return pipe. a fuel cell stack formed by stacking a plurality of fuel cells for generating electricity by electrochemical reactions of a fuel gas and an oxygen-containing gas; a reformer for reforming a mixed gas of a raw fuel chiefly containing hydrocarbon and water vapor to produce the fuel gas supplied to the fuel cell stack; an evaporator for evaporating water, and supplying the water vapor to the reformer; a heat exchanger for raising a temperature of the oxygen-containing gas by heat exchange with a combustion gas, and supplying the oxygen-containing gas to the fuel cell stack; an exhaust gas combustor for combusting the fuel gas discharged from the fuel cell stack as a fuel exhaust gas and the oxygen-containing gas discharged from the fuel cell stack as an oxygen-containing exhaust gas to produce the combustion gas; and a start-up combustor for combusting the raw fuel and the oxygen-containing gas to produce the combustion gas, wherein the evaporator includes an annular water supply chamber to which the water is supplied, an annular water vapor discharge chamber to which the water vapor is discharged, a plurality of evaporation pipes each having one end connected to the water supply chamber and another end connected to the water vapor discharge chamber, and a combustion gas channel for supplying the combustion gas between the evaporation pipes; and an evaporation return pipe is provided that connects the water vapor discharge chamber and an inlet of the reformer and is a passage of the water vapor, characterized in that a raw fuel pipe is inserted into the evaporation return pipe for allowing the raw fuel to flow from a downstream side to an upstream side of the evaporation return pipe.