NOVELTY - The fuel cell system comprises: a fuel cartridge (20) configured to store a hydrogen storage alloy; a holder having a first flat plate and a second flat plate that is disposed in opposition to the first flat plate; and a fuel cell module fixed to an outer surface of the first flat plate and thermally connected to the cartridge via the holder. The first and second flat plates are so arranged as to be pressed against the cartridge when the cartridge is placed in the holder. The holder is configured to house the cartridge between the first and second flat plates in a detachable manner.    USE - The fuel cell system is useful in space applications, automobiles, mobile devices and large and small scale power generation applications.    ADVANTAGE - The eco-friendly system can reliably transfers the heat generated by the fuel cell to a hydrogen storage alloy, and exhibits high power generation efficiency, reduced emission of nitrogen compounds, and minimal noise or vibration.    DETAILED DESCRIPTION - The fuel cell system comprises: a fuel cartridge (20) configured to store a hydrogen storage alloy; a holder having a first flat plate and a second flat plate that is disposed in opposition to the first flat plate; and a fuel cell module fixed to an outer surface of the first flat plate and thermally connected to the fuel cartridge via the holder. The first and second flat plates are so arranged as to be pressed against the fuel cartridge when the fuel cartridge is placed in the holder. The holder is configured to house the fuel cartridge between the first and second flat plates in a detachable manner. A part of a spacing between the first and second flat plates is enlarged when the fuel cartridge is loaded into or removed from the holder. The fuel cell system further comprises: a jointing section (36) that joints one side of the first flat plate to one side of the second flat plate, where an another side of the first flat plate excluding the one side of the first flat plate is separated from another side of the second flat plate corresponding to the another side of the first flat plate; a first extending section that extends from another side of the first flat plate disposed in opposition to the one side of the first flat plate, which is connected to the jointing section, toward the second flat plate; and a second extending section that extends from another side of the second flat plate disposed in opposition to the one side of the second flat plate, which is connected to the jointing section, toward the second flat plate.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic perspective view of a fuel cell system.    Fuel cartridge (20)    Jointing section (36)    First fuel cell module (40)    Second fuel cell module (50)    Fuel supply unit. (60)