PROBLEM TO BE SOLVED: To provide, in a sterilizer having an automatic door opening/closing mechanism, a high-in-safety configuration which can effectively prevent a situation where the drive of the opening/closing door is continued in a state of the opening/closing door not appropriately supported due to foreign objects.SOLUTION: The sterilizer 1 of the present embodiment includes: a main body 10 in which an opening for receiving an object to be treated is formed an opening/closing door 30 for opening/closing the opening of the main body an arm 32 provided on the opening/closing door 30 a support base 62 for supporting the arm 32 a movement mechanism 40 for moving the opening/closing door 30 between a closing position to close the opening of the main body 10 and an open position to open the opening thereof by vertically moving the support base 62 a limit switch 65 for detecting the contact state between the arm 32 and the support base 62 and a controller 90 for controlling the movement mechanism 40 so as to stop the movement of the opening/closing door 30 when the limit switch 65 detects the non-contact state between the arm 32 and the support base 62 during the movement of the opening/closing door 30.SELECTED DRAWING: Figure 9COPYRIGHT: (C)2017,JPO&INPIT【課題】自動扉開閉機構を有する殺菌装置において、異物によって開閉扉が適切に支持されていない状態で開閉扉の駆動が継続される事態を効果的に防止できる安全性の高い構成を提供すること。【解決手段】本実施形態の殺菌装置1は、被処理物を収容する開口が形成される本体10と、本体の開口を開閉する開閉扉30と、開閉扉30に設けられるアーム部32と、アーム部32を支持する支持ベース62と、支持ベース62を上下に移動させることにより、本体10の開口を閉じる閉鎖位置と開口を開ける開放位置の間で開閉扉30を移動させる移動機構40と、アーム部32と支持ベース62の接触状態を検出するリミットスイッチ65と、開閉扉30の移動中に、リミットスイッチ65がアーム部32と支持ベース62の非接触状態を検出すると開閉扉30の移動を停止するように移動機構40を制御する制御部90と、を備える。【選択図】図9