Reformer for producing hydrogen-containing gas by a reforming reaction using a raw material (3), hydrogenated desulfurizer for removing sulfur compounds in the raw material (2), the raw material before entering the hydrogenation desulfurizer and recycling passage downward slope with hydrogen-containing gas flows is formed to be added, the hydrogen generating apparatus comprising a drainage channel and (8) for draining the condensed condensate in recycle flow path descending slope (7) ( 100).