NOVELTY - A fuel cell reformer comprises a thermal treatment unit (40) disposed in the main body to supply thermal energy to a reforming reaction unit (34) and to a carbon monoxide reduction unit (50) at a time of initial driving of the reformer. The thermal energy supplied to the reforming reaction unit corresponds to an operational temperature range of the reforming reaction unit that is unique. The thermal energy supplied to the carbon monoxide reduction unit corresponds to an operational temperature range of the carbon monoxide reduction unit that is unique.    USE - For a general fuel cell system employing a polymer electrolyte membrane fuel cell that generates electrical energy.    ADVANTAGE - The thermal treatment unit is capable of supplying thermal energy generated at the time of initial driving of the fuel cell reformer to a reforming reaction unit and a carbon monoxide reaction unit in operational temperature ranges so that usage efficiency of the thermal energy required for the overall operations of the fuel cell reformer is improved and an initial driving time of the fuel cell reformer is shortened. Operational efficiency of the fuel cell reformer is maximized.    DETAILED DESCRIPTION - A fuel cell reformer comprises: a main body (30) having a first pipe (21) and a second pipe (22) disposed at an inner portion of the first pipe; a thermal source unit (31) disposed in the second pipe to generate heat; a reforming reaction unit disposed in a first region between the first pipe and the second pipe to generate a reforming gas containing hydrogen through a reforming reaction of a fuel; a carbon monoxide reduction unit disposed in a region other than the first region between the first pipe and the second pipe to reduce a concentration of carbon monoxide contained in the reforming gas; and a thermal treatment unit disposed in the main body to supply thermal energy to the reforming reaction unit and to the carbon monoxide reduction unit at a time of initial driving of the reformer. The thermal energy supplied to the reforming reaction unit corresponds to an operational temperature range of the reforming reaction unit that is unique. The thermal energy supplied to the carbon monoxide reduction unit corresponds to an operational temperature range of the carbon monoxide reduction unit that is unique.    DESCRIPTION OF DRAWING(S) - The figure shows a cross-sectional view of a reformer.    First pipe (21)    Second pipe (22)    First discharging hole (22b)    Reformer main body (30)    Thermal source unit (31)    Torch (32)    First injection hole (32a)    Reforming reaction unit (34)    Second injection hole (34a)    Reforming catalyst (35)    First reaction unit (37)    Second discharging hole (37a)    Water gas shift catalyst (38)    Barrier (39)    Holes (39a)    Thermal treatment unit (40)    Thermal isolation component (41)    Carbon monoxide reduction unit (50)