NOVELTY - Hydrogen generation device that reforms to hydrogen by contacting raw material gas of hydrocarbon and aliphatic alcohol with reforming catalyst raised to 700 degreesC comprises: (1) reforming catalyst comprising combustion catalyst to promote reaction of hydrogen and oxygen and/or a reforming catalyst; (2) tubular reactor; (3) external hydrogen supply; and (4) external air supply.    USE - Used e.g. to produce hydrogen for use in fuel cells.    ADVANTAGE - The time required for a start up operation is reduced by elevating the temperature of the reforming catalyst to a temperature for the reforming by supplying hydrogen and air to the combustion catalyst. Miniaturization of a hydrogen generation device is possible since no separate heating device is required.    DETAILED DESCRIPTION - Hydrogen generation device that reforms to hydrogen by contacting raw material gas of hydrocarbon and aliphatic alcohol with reforming catalyst raised to 700 degreesC comprises:    (1) reforming catalyst comprising a combustion catalyst which promotes the reaction of hydrogen and oxygen, or a mixture or combination of a combustion catalyst and a reforming catalyst;    (2) tubular reactor in which the reforming catalyst is housed;    (3) external hydrogen supply means for catalytic combustion which supplies hydrogen to the reactor; and    (4) external air supply means for supplying air to the tubular reactor.    DESCRIPTION OF DRAWING(S) - Figure 1 shows the reforming device.    Reforming container (11)    Valve (14)    Valve (15)    Valve (16)    Pipe (17)    Pipe (18)    Pipe (19)    Thermometer (22)    Gas outlet (26)    Communication pipe (44)    Tubular container (51)    Top porous plate (52)    Lower porous plate (53)    Upper panel (54)    Gas dispersion chamber (56)    Particles (57)    Reforming space (58)    Reforming catalyst (61)    Space (62)    CO modification catalyst (63)    Upper modification catalyst (63a)    Lower modification catalyst (63b)    CO removal catalyst (64)    Heat retaining material (66)    Lower panel (67)    Sensor (68)    Top end (68a)    Temperature display part (69)