FUEL CELL SYSTEM AND REFORMER THEREFOR

A fuel cell system includes a stack (10) for generating electrical energy by a reaction of the hydrogen and oxygen, a reformer (30) for generating hydrogen gas from fuel through a chemical catalytic reaction by thermal energy, a fuel supply (50) assembly for supplying fuel to the reformer, and an air supply assembly (70) for supplying air to the reformer and the stack. The reformer includes a plurality of reactors having a channel, respectively, and being stacked.