To provide an overheated steam treatment apparatus in which the inner surface of a lid is hard to come into contact with a worker.SOLUTION: The superheated steam treatment apparatus 1 includes an overheated steam generator 50 for generating superheated steam, a furnace support section 126 for supporting a reaction furnace 60 to which superheated steam is supplied from the superheated steam generator 50, A lid 62 for closing the opening portion, a housing for accommodating the overheated steam generating device 50 and the furnace support portion 126, and a lid holding portion 71 provided in the casing so as to hold the lid 62.(FIG.【課題】蓋の内面が作業者に接触しにくい過熱蒸気処理装置を提供する。【解決手段】過熱蒸気処理装置1は過熱蒸気を生成する過熱蒸気発生装置50と、過熱蒸気発生装置50から過熱蒸気が供給される反応炉60を支持する炉支持部126と、反応炉60の開口部を閉じる蓋62と、過熱蒸気発生装置50および炉支持部126を収容する筐体と、蓋62を保持できるように筐体内に設けられた蓋保持部71とを備える。【選択図】図2
