NOVELTY - A fuel supply system, which supplies alcohol to an anode (110) from a fuel chamber (200), has a spreader (300), a supply control unit and a buffer. Spreader has an inlet (322) that receives alcohol from fuel chamber and allows the alcohol received from fuel chamber to be uniformly distributed with respect to entire surface of anode. Supply control unit controls alcohol supply from fuel chamber to the inlet of spreader. Buffer is made of porous material e.g. porous ceramic, fabric and polymer porous medium and set between the spreader and anode to limitedly pass the alcohol towards the anode.    USE - DAFC for changing chemical energy of fuel into electrical energy through chemical reaction.    ADVANTAGE - Minimizes unnecessary consumption of fuel when DAFC is not in operation while appropriate amount of fuel supplying to the anode is maintained if flow channel is formed to have volume to accommodate amount of alcohol sufficient for 0.5 to 5-minute operation after the fuel supply is blocked. Provides DAFC that uniformly supplies fuel to anode regardless of the inclination angle of DAFC since alcohol that enters one of the X-shaped channels is more likely to remain trapped in the X-shaped channel when DAFC is tilted rather than flow to another region. Ensures rapid replacement or refilling of the fuel chamber since fuel chamber is formed as one piece with the main body of DAFC or formed to be attachable to and detachable from the main body of DAFC. Obtains stable and uniform supply of fuel during normal operation by reducing unnecessary fuel consumption during shutdown operation. Unnecessary fuel consumption is reduced since further fuel supply from fuel chamber is blocked by closing the valve when DAFC is not in operation. Prevents phenomenon of crossover that occurs when excessive amount of alcohol is present at the anode since fuel supply is blocked when the DAFC is not in operation, thus increasing the lifetime of DAFC. Prevents fuel supply difference in different positions of the buffer due to gravitational force when maximum length of buffer or separate buffer panel is appropriately designed.    DESCRIPTION OF DRAWING(S) - The drawing shows an exploded perspective view of a DAFC.    Anode (110)    Fuel chamber (200)    Spreader (300)    Nozzles (321)    Inlet (322)