Method of inspecting output of fuel cell

A method of inspecting an output of a fuel cell, the fuel cell comprising an electrolyte membrane of solid polymer, an anode provided on one surface of the electrolyte membrane, and a cathode provided on the other surface of the electrolyte membrane,

• the method comprising:
• an oxidation step of applying oxidation treatment to an electrode catalyst contained in the anode and the cathode;
• and
• a measurement step of measuring the output of the fuel cell after the oxidation treatment is applied to the electrode catalyst, by applying a measurement current which is smaller than a rated current of the fuel cell to the anode and the cathode;
• wherein in the oxidation step, a fuel qas is supplied to the anode and an oxygen-containing gas is supplied to the cathode to cause a voltage between the anode and the cathode to be not less than a reduction potential of the electrode catalyst.