NOVELTY - Hydrogen manufacturing apparatus consists of water vapor modification reactor (3), burner (2), water evaporator (4), carbon monoxide transforming reactor (6), selective oxidation device (7), combustion air supplying line (11), fuel supplying line (12), hydrocarbon oil supplying line (16) and water vapor supplying line (22) in sealable container (1). The apparatus manufactures hydrogen-containing gas from hydrocarbon oil.    USE - For manufacturing hydrogen-containing gas from hydrocarbon oil such as kerosene, used to fuel electrode of fuel cell of fuel cell system (claimed).    ADVANTAGE - Hydrogen manufacturing apparatus is compact, and has lightweight. Temperature of the apparatus is easily and effectively controlled, and hence coking is prevented.    DETAILED DESCRIPTION - Hydrogen manufacturing apparatus consists of water vapor modification reactor (3), burner (2), water evaporator (4), carbon monoxide transforming reactor (6), selective oxidation device (7), combustion air supplying line (11), fuel supplying line (12), hydrocarbon oil supplying line (16) and water vapor supplying line (22) in a sealable one cylindrical container (1). The apparatus manufactures hydrogen-containing gas from hydrocarbon oil. The combustion air supplying line and fuel supplying line supply air and fuel, respectively for combustion to the burner from bottom portion of the container. The hydrocarbon oil supplying line supplies hydrocarbon oil to the reactor (3) from bottom portion of the container. The water vapor supplying line supplies water vapor to the reactor (3) from water evaporator.    An INDEPENDENT CLAIM is included for fuel cell system, which has at least hydrogen manufacturing apparatus, and fuel cell which uses hydrogen-containing gas manufactured by hydrogen manufacturing apparatus to fuel electrode.    DESCRIPTION OF DRAWING(S) - The figure shows sectional side view of the hydrogen manufacturing apparatus.    container (1)    burner (2)    water vapor modification reactor (3)    water evaporator (4)    carbon monoxide transforming reactor (6)    selective oxidation device (7)    combustion air supplying line (11)    fuel supplying line (12)    water supplying line (I) (14)    water supplying line (II) (15)    hydrocarbon oil supplying line (16)    water vapor supplying line (22)    center axis (100)