NOVELTY - The operation of fuel cell is started and hydrogen is supplied to anode of the fuel cell. A predetermined electric potential is applied to the cathode of the fuel cell. The starting operation of the fuel cell is completed after fixed time impression of predetermined electric potential at cathode is performed. The fixed time supply of hydrogen is continued at predetermined flow rate to flow path of anode. The time to supply the hydrogen to flow path of the anode is set according to amount of catalyst metal provided in the cathode.    USE - For controlling fuel cell such as polymer electrolyte fuel cell used in vehicle (claimed), such as motor vehicle and electric vehicle.    ADVANTAGE - The contamination of cathode catalyst layer can be removed completely before starting electric power generation. The electric power generation capability of initial stage can be maintained over long period of time.    DETAILED DESCRIPTION - The supply of hydrogen is continued until the density of the hydrogen in the flow path reaches predetermined density. The supply of hydrogen is continued until the ratio of the density of hydrogen in the supply side of flow path and density in exhaustion side is greater or equal to the set value. The reverse polarity electric potential during electric power generation of fuel cell, is 0.9-1.2 volt per cell. The d002 lattice space of the carbon support, is set to 3.36-3.60 Angstrom . The Brunauer Emmet Teller specific surface area of carbon support is set to 20-850m2/g. The exhaustion side of flow path is interrupted after hydrogen is supplied. The exhaustion side of flow path is released after predetermined electric potential is applied. The oxygen is supplied to the cathode and fuel cell is driven after the hydrogen is supplied to the anode.    INDEPENDENT CLAIMS are also included for:    (1) fuel cell controller; and    (2) vehicle.    DESCRIPTION OF DRAWING(S) - The figure shows a flowchart illustrating operation of controller of fuel cell. (Drawing includes non-English language text).