The disclosed electricity-generation device is provided with: a cylindrical fuel cell (2) in which internal and external electrodes (5 and 6) to which a fuel gas is supplied sandwich an electrolyte layer (7), with the interior of the cylindrical fuel cell forming an inside channel (3) for said fuel gas; a covering pipe (9) disposed outside the aforementioned fuel cell (2) at a separation from the aforementioned external electrode (6); a connecting member (13) which connects the fuel cell (2) to the covering pipe (9), utilizing the aforementioned separation outside the fuel cell (2) to create an outside channel (4) for the fuel gas; and fuel gas pipes (12) that are connected to both ends of the covering pipe (9) and that, together with the covering pipe (9), form a path for the fuel gas.
