NOVELTY - Plate heat exchanger type reformer comprises a reforming unit (10) provided with a heating channel to recover heat from high-temperature exhaust gas which is discharged in upper portion, and supplied in a lower portion, a reaction channel to generate hydrogen gas from the mixed gas via heat exchanger and reforming catalytic reaction with heat of the heating channel, and located in multiple numbers transversely and alternatively between two outer covers, and an exhaust gas inlet (20) and an exhaust gas outlet (30) for supplying and discharging high-temperature exhaust gas in the heat channel.    USE - The plate heat exchanger type reformer is useful in fuel cell system (claimed).    ADVANTAGE - The reformer promotes reforming reaction of gas.    DETAILED DESCRIPTION - Plate heat exchanger type reformer comprises a reforming unit (10) provided with a heating channel for recovering heat from high-temperature exhaust gas which is discharged to upper portion, and supplied from a lower portion, a reaction channel for generating hydrogen gas from the mixed gas via heat exchanger and reforming catalytic reaction with heat of the heating channel, and located in multiple numbers transversely and alternatively between two outer covers, an exhaust gas inlet (20) and an exhaust gas outlet (30) for supplying and discharging the high-temperature exhaust gas in the heat channel, provided on lower and upper surface of the reforming unit, a hydrogen gas discharging unit (50) for discharging the hydrogen gas generated from a supplied mixed gas, provided on one upper side and other lower side of the reforming unit, a mixed gas inlet (40) for supplying the mixed gas to the reaction channel, a catalyst output globe for discharging and introducing the catalyst into the reaction channel by opening and closing the cover, provided on upper side of the hydrogen gas exhaust unit, and on the reforming unit.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic representation of the plate heat exchanger type reformer.    Reforming unit (10)    Waste gas inlet (20)    Exhaust gas outlet (30)    Mixed gas inlet (40)    Hydrogen gas outlet part (50)