NOVELTY - Hydrogen generator comprises a raw material supply part, a water supply part, a water vaporization part, a reforming part including a reforming catalyst for generating reformed gas from the raw material and the water by steam reforming reaction, a burner for heating the reforming part, a fuel supply part, an air supply part, and a combustion catalyst arranged in a combustion gas flow path for passing combustion gas discharged from the burner.    USE - The hydrogen generator is used in an electric generator (claimed). It is used for generating hydrogen-rich gas which is supplied to devices using hydrogen, e.g. fuel cells.    ADVANTAGE - The hydrogen generator is capable of preventing emission of carbon monoxide and hydrogen which may occur if the air ratio in the burner is reduced or during the start-up time, and generating hydrogen in a clean and safe state with high reforming efficiency. It is capable of accelerating water vaporization immediately after the start-up and reducing the start-up time.    DETAILED DESCRIPTION - Hydrogen generator comprises a raw material supply part (1) for supplying a raw material containing a compound formed of at least carbon and hydrogen, a water supply part (2) for supplying water, a water vaporization part (3) for vaporizing water supplied from the water supply part, a reforming part (4) including a reforming catalyst for generating reformed gas from the raw material and the water by steam reforming reaction, a burner (7) for heating the reforming part, a fuel supply part (6) for supplying fuel to the burner, a first air supply part (5) for supplying air for combustion to the burner, and a combustion catalyst (12) arranged in a combustion gas flow path for passing combustion gas discharged from the burner.    An INDEPENDENT CLAIM is also included for an electric generator comprising the hydrogen generator and a fuel cell for generating electric power using oxygen-containing oxidant gas and hydrogen-containing reformed gas supplied by the hydrogen generator.    DESCRIPTION OF DRAWING(S) - The figure is a view illustrating a structure of a hydrogen generator.    Raw material supply part (1)    Water supply part (2)    Water vaporization part (3)    Reforming part (4)    First air supply part (5)    Fuel supply part (6)    Burner (7)    Combustion catalyst (12)