To reduce noise generated by waste water or exhaust after sterilization treatment to prevent dew condensation water from adhering to an object to be sterilized. SOLUTION: A can body 2 having a heater 12 and capable of containing a sterilized object 3 and a drainage pipe connected to the can body 2 and having an opening and closing means 34 for opening and closing a flow path to discharge it, 32, and an exhaust steam tank 35 which is provided in the middle of the exhaust pipe 32 and has a flow path cross-sectional area larger than that of the exhaust pipe 32. (FIG.【課題】滅菌処理後の排水や排気で発生するノイズを低減し、被滅菌物への結露水の付着を防止する。【解決手段】ヒータ１２を有し、被滅菌物３を収容可能な缶体２と、缶体２に接続され、流路を開閉することにより排蒸可能とする開閉手段３４を有する排蒸管３２と、排蒸管３２の途中に設けられ、排蒸管３２に比べて流路断面積の大きい排蒸タンク３５とを備える。【選択図】図４
