The present invention improves the start-up characteristics of a fuel gas
generating apparatus for a fuel cell comprising a reformer. In a fuel gas
generating apparatus 1 for a fuel cell comprising a vaporizer 22 that
generates a fuel vapor by vaporizing a raw liquid fuel, a reformer 11
that generates a reforming gas that includes hydrogen from the raw fuel
gas that has been partially oxidized by adding reforming air to the fuel
vapor generated by the vaporizer 22, and a CO eliminator 13 that
generates a fuel gas having carbon monoxide eliminated by adding a CO
eliminating air to the reforming gas generated by the reformer 11, the
supplied amount of the reforming air during the warm-up of the fuel gas
generating apparatus for a fuel cell is larger than the supplied amount
of reforming air during idle operation after completion of the warm-up.