NOVELTY - A solid oxide fuel cell apparatus consists of fuel cell module, modifier (20), combustion chamber, fuel gas unit, water supply unit, oxidizing agent gas supply unit, temperature acquisition unit, and control unit. The fuel cell module has a fuel cell accommodated in the surface having fuel gas path, and the inner surface of fuel cell contains anode electrode and cathode electrode. The combustion chamber heats the modifier arranged in the fuel cell module using combustion gas, and burns and emits the remainder fuel gas passed through the fuel cell.    USE - Solid oxide fuel cell apparatus is used for generating electric power.    ADVANTAGE - The solid oxide fuel cell apparatus exhibits optimal driving performance and controllable detection precision of temperature sensor, and does not have influence on the temperature environment inside the module.    DETAILED DESCRIPTION - A solid oxide fuel cell apparatus consists of fuel cell module, modifier, combustion chamber, fuel gas unit, water supply unit, oxidizing agent gas supply unit, temperature acquisition unit, and control unit. The fuel cell module has a fuel cell accommodated in the surface having fuel gas path, and the inner surface of fuel cell contains anode electrode and cathode electrode. The modifier generates a fuel gas containing hydrogen by performing reforming reaction through partial oxidation-reformation of to-be-modified gas by arranging in the fuel cell module, chemically-reacting to-be-modified gas and oxidizing agent gas, and carrying out steam reforming reaction by chemically reacting to-be-modified gas and water steam. The combustion chamber heats the modifier arranged in the fuel cell module using combustion gas, and burns and emits the remainder fuel gas passed through the fuel cell. The fuel gas unit supplies the fuel gas modified with modifier into the fuel cell by supplying the to-be-modified gas into the modifier. The water supply unit supplies the water for modification into the modifier. The oxidizing agent gas supply unit supplies the oxidizing agent gas into the fuel cell for electric power generation. The temperature acquisition unit acquires the temperature in the fuel cell module based on the temperature of the fuel cell module. The control unit controls the fuel gas unit, water supply unit, and oxidizing agent gas supply unit, and performs the starting control by heating up to electric power-generating temperature of the fuel cell stack. The temperature acquisition unit has a modifier temperature sensor (148) for detecting the side surface temperature of the modifier. The temperature of the modifier is detected by inserting and pressing a thermocouple (148a) in the side surface of the modifier. The thermocouple consists of a support heat exchanger plate (20a) arranged under the side surface of the modifier for heat-transferring the temperature of the modifier to the thermocouple.    DESCRIPTION OF DRAWING(S) - The drawing shows the cross-sectional view of center vicinity of the fuel cell module.    Modifier (20)    Support heat exchanger plate (20a)    Casing (56)    Modifier temperature sensor (148)    Thermocouple (148a)