FUEL CELL POWER GENERATING DEVICE

PROBLEM TO BE SOLVED: To operate stably and safely without causing a damage of a fuel cell body, by suppressing a pressure rise even when a quantity of gas exhausted from a fuel cell increases rapidly by gas displacement, load breakage and the like. SOLUTION: In a fuel cell power generating device in which gas exhausted from a fuel electrode of a fuel cell 1 is led to an ejector 2 through a recirculation circuit 12, and supplied to the fuel electrode by mixing with raw fuel, a gas discharge piping with a series connection body consisting of a pressure guage 5, a non-return valve 6 and a ristrictor 7 are equipped in the recirculation circuit 12, and also a bypassing piping 17 equipped with a cut-off valve 8 to switch on and off by a measured signal of the pressure guage 5 is assembled in parallel with the discharge piping 13.