NOVELTY - A solid oxide fuel cell apparatus comprises fuel cell stack which electrically connects 2 fuel cell units containing cell which consists of cathode electrode, anode electrode, and solid electrolyte on support surface without electroconductivity, fuel cell module which accommodates fuel cell stack inside, modifier which can generate hydrogen by steam reforming reaction which chemically reacts fuel and water vapor, evaporator which evaporates supplied water for steam reforming, fuel-supply part to send modified fuel into fuel cell stack, water supply part, and oxidizing agent gas supply part.    USE - A solid oxide fuel cell apparatus (claimed).    ADVANTAGE - In the fuel gas path upstream, fuel exhaustion in downstream cell part can be suppressed by not carrying out shift modification of CO as much as possible, carrying out shift modification of CO in downstream, and generating hydrogen to make the fuel for electric power generation, resulting in fuel utilization efficiency. Fuel cell suppresses discharge amount of CO.    DETAILED DESCRIPTION - A solid oxide fuel cell apparatus comprises fuel cell stack which electrically connects 2 fuel cell units containing cell which consists of cathode electrode, anode electrode, and solid electrolyte on support surface without electroconductivity, fuel cell module which accommodates fuel cell stack inside, modifier which can generate hydrogen by steam reforming reaction which chemically reacts fuel and water vapor, evaporator which evaporates supplied water for steam reforming, fuel-supply part to send modified fuel into fuel cell stack, water supply part which supplies water for modification to evaporator, oxidizing agent gas supply part for electric power generation to supply oxidizing agent gas to fuel cell stack, control part which controls to power the fuel cell stack, fuel gas path through which fuel gas passes to support body of fuel cell unit, and metal catalyst for shift modification which can generate hydrogen by shift reforming reaction of water vapor and carbon monoxide (CO) in fuel gas path and is arranged to be more downstream of the apparatus.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of the reaction which arises in the fuel gas path in the fuel cell stack of the fuel cell apparatus. (Drawing includes non-English language text).    Support body which has metal catalyst for shift modification (201)    Support body which does not have metal catalyst for shift modification (202)