FUEL CELL SYSTEM

PROBLEM TO BE SOLVED: To provide a fuel cell system which can supply fuel gas appropriately.SOLUTION: The fuel cell system has an injector 23A and an injector 23B which inject fuel gas, and an ECU 50. The ECU 50 has: a fuel gas request amount calculation section 501 which calculates a fuel gas request amount required for power generation of a fuel cell 1; an INJ A, B interval setting section 502 which sets a first interval and a second interval according to the fuel gas request amount; an INJ A injection amount calculation section 504 which calculates a valve-opening time of the injector 23A in the first interval; an INJ B injection amount calculation section which calculates the valve-opening time of the injector 23B in the first interval; and an INJ B injection timing setting section 506 which sets an injection start time of the injector 23B so that the valve of the injector 23B can be opened while the valve of the injector 23A is closed, in the case that a fuel gas request amount is a first threshold value or more when the valve opening of the injector 23A is started.