NOVELTY - The power generation device comprises a hydrogen generator (6), a polyelectrolyte fuel cell (1), a combustor (7) for heating at least the reformer, a flow rate controller (8) for controlling the supply amount of a combustion fuel, a communicating passage (10) between the combustor (7) and the flow rate controller (8), a merging unit (11) for merging residual fuel gases and an incomplete produced gas with a combustion fuel, and a connecting tube (12) for transmitting a pressure between the merging unit (11) and the flow rate controller (8) to the flow rate controller (8).    USE - None given.    ADVANTAGE - The problem with a conventional power generation device is resolved in that an incomplete produced gas conventionally exhausted to the outside, when the temperature of the hydrogen generator is outside a preset temperature range such as at starting, is likely to ignite.    DETAILED DESCRIPTION - A power generation device includes a hydrogen generator consisting of a reformer, transformer, purifier, gas flow passages connecting them together, and a produced gas exhaust port, and a polyelectrolyte fuel cell. The power generation device comprises the hydrogen generator (6), the polyelectrolyte fuel cell (1), a combustor (7) for heating at least the reformer, a flow rate controller (8) for controlling the supply amount of a combustion fuel, a communicating passage (10) between the combustor (7) and the flow rate controller (8), a merging unit (11) for merging residual fuel gases and an incomplete produced gas with a combustion fuel, and a connecting tube (12) for transmitting a pressure between the merging unit (11) and the flow rate controller (8) to the flow rate controller (8). The combustion fuel supply amount is controlled by the above pressure, so that an incomplete produced gas conventionally exhausted to the outside, when the temperature of the hydrogen generator (6) is outside a preset temperature range such as at starting, is likely to ignite.    DESCRIPTION OF DRAWING(S) - The drawing shows the power generation device. (Drawing includes non-English language text).    Polyelectrolyte fuel cell (1)    Combustor (7)    Controller (8)    Communicating passage (10)    Merging unit (11)    Connecting tube (12)