NOVELTY - A fuel reformer (10) reforms fuel containing hydrocarbon by catalytic reaction, and generates hydrogen. The fuel reformer contains fuel introduction unit (11), air introducing unit (12), mixer (13), reforming section (14), reformed gas channel (15) and circulation flow passage (16). The fuel introduction unit is provided with fuel passage (11a) and injectsor (11b). The air introducing unit is provided with airstream path (12a), and pressure regulation unit (12b). The reforming section is provided with catalytic converter (14a,14b).    USE - Fuel reformer is used for manufacturing hydrogen for fuel cell and energy source of internal combustion engine.    ADVANTAGE - The fuel reformer efficiently provides hydrogen in high yield without caulking, and can be easily controlled.    DETAILED DESCRIPTION - A fuel reformer reforms fuel containing hydrocarbon by catalytic reaction, and generates hydrogen. The fuel reformer contains a fuel introduction unit, an air introducing unit, a mixer, a reforming section, a reformed gas channel and a circulation flow passage. The fuel introduction unit is provided with a fuel passage where fuel circulates, and an injector which injects fuel which circulated through fuel passage. The air introducing unit is provided with airstream path where air circulates, and a pressure regulation unit to adjust air content which adjusts pressure in airstream path and circulates. The mixer mixes fuel and air to form mixed gas. The reforming section is provided with catalytic converter which reforms fuel in mixed by catalytic reaction. The reformed gas channel circulates the reformed gas refined by reforming section. The circulation flow passage connects airstream path and reformed gas channel, and circulates reformed gas in said mixer through airstream path. The fuel is light oil.    DESCRIPTION OF DRAWING(S) - The drawing shows schematic block diagram of fuel reformer.    Fuel reformer (10)    Fuel introducing unit (11)    Fuel passage (11a)    Injector (11b)    Air introduction unit (12)    Airstream path (12a)    Pressure regulation unit (12b)    Mixer (13)    Reforming section (14)    Catalytic convertor (14a,14b)    Reformed gas channel (15)    Circulation flow passage (16)