NOVELTY - A fuel reforming apparatus, for reforming a raw fuel containing a hydrocarbon-containing compound to produce a hydrogen-rich fuel gas for use in a fuel cell, comprises reformer, raw fuel supply device, water supply device, oxygen supply device, and controller, which executes a carbon removal process for removing carbon deposited on the reforming catalyst under predetermined condition.    USE - For reforming a raw fuel containing a hydrocarbon-containing compound to produce a hydrogen-rich fuel gas for use in a fuel cell.    ADVANTAGE - The fuel reforming apparatus is capable of reducing an amount of carbon deposited and accumulated on a reforming catalyst.    DETAILED DESCRIPTION - A fuel reforming apparatus for reforming a raw fuel containing a hydrocarbon-containing compound to produce a hydrogen-rich fuel gas for use in a fuel cell, comprises reformer including a reforming catalyst, the reformer reforming the raw fuel by utilizing at least a steam reforming reaction and a partial oxidation reaction; raw fuel supply device that supplies the reformer with the raw fuel; water supply device that supplies the reformer with water so that at least a part of the supplied water is used for the steam reforming reaction; oxygen supply device that supplies the reformer with oxygen so that at least a part of the supplied oxygen is used for the partial oxidation reaction of the raw fuel at the reforming catalyst; and controller that controls the raw fuel supply device, the water supply device and the oxygen supply device. The controller executes a carbon removal process for removing carbon deposited on the reforming catalyst under a predetermined condition by controlling at least an amount of raw fuel supplied to the reformer and an amount of the oxygen supplied to the reformer so that an oxygen/carbon (O/C) ratio of the number of oxygen atoms supplied from the oxygen supply device to the number of carbon atoms contained in the raw fuel supplied from the raw fuel supply device becomes larger than an appropriate range of the O/C ratio that is to be established during a normal operation of the reformer.    INDEPENDENT CLAIMS are included for:    (a) a moving object comprising a fuel cell; a secondary battery; a fuel reforming apparatus that reforms a raw fuel containing a hydrocarbon-containing compound to produce a hydrogen-rich fuel gas for use in fuel cell; driving motor that generates a force to drive the moving object; drive circuit that drives the driving motor by using an electric power supplied from at least one of the fuel cell and the secondary battery; and controller that controls the fuel reforming apparatus; and    (b) a method of controlling a reformer that reforms a raw fuel comprising executing a carbon removal process for removing carbon deposited on the reforming catalyst under a predetermined condition.    DESCRIPTION OF DRAWING(S) - The figure a schematic diagram showing the construction of an electric vehicle equipped with a fuel reforming apparatus.