Provided is a cleaning / sterilizing apparatus capable of easily detecting a deviation of a pressure sensor or a temperature sensor from a normal value and determining whether calibration is necessary. An apparatus for cleaning or sterilizing an object to be processed, comprising: a processing tank in which the object is stored； a pressure sensor for detecting an absolute pressure in the processing tank； A temperature sensor 28 for detecting a temperature and a calibration determination unit are provided. The calibration determination means determines whether (a) the temperature difference between the saturation temperature at the pressure detected by the pressure sensor 27 and the temperature detected by the temperature sensor 28 is equal to or larger than a set value under a saturated steam environment in the processing tank 2； Based on whether the pressure difference between the saturated pressure at the temperature detected by the temperature sensor 28 and the pressure detected by the pressure sensor 27 is equal to or greater than a set value, it is determined whether or not the calibration of the sensors 27 and 28 is necessary. [Selection diagram] Fig. 1【課題】簡易に、圧力センサまたは温度センサの正常値からのズレを検知して、校正の要否を判定できる洗浄・滅菌装置を提供する。【解決手段】被処理物を洗浄または滅菌する装置であって、被処理物が収容される処理槽２と、この処理槽２内の絶対圧力を検出する圧力センサ２７と、処理槽２内の温度を検出する温度センサ２８と、校正判定手段とを備える。校正判定手段は、処理槽２内の飽和蒸気環境下において、（ａ）圧力センサ２７の検出圧力における飽和温度と温度センサ２８の検出温度との温度差が設定値以上であるか、（ｂ）温度センサ２８の検出温度における飽和圧力と圧力センサ２７の検出圧力との圧力差が設定値以上であるかに基づき、各センサ２７，２８の校正の要否を判定する。【選択図】図１
