A fuel cell system supplies anode gas and cathode gas to a fuel cell and causes the fuel cell to generate power according to a load. The fuel cell system includes a supply passage configured to supply the anode gas to the fuel cell, a pressure control valve that provided in the supply passage and configured to adjust a pressure of the anode gas supplied to the fuel cell, and a discharge passage configured to discharge the anode gas from the fuel cell. The fuel cell system includes an ejector that provided in the supply passage configured to suck the anode gas discharged to the discharge passage and circulate the anode gas to the fuel cell by the anode gas supplied from the pressure control valve, and a control unit configured to pulsate the pressure of the anode gas supplied to the ejector.