An endoscope cleaning and disinfecting apparatus according to the present invention is an endoscope cleaning and disinfecting apparatus that performs processing on an endoscope in a processing tank having an opening, and a lid member that opens and closes the opening； In a state where the lid member is located at the closed position, a seal member sandwiched between the lid member and the treatment tank, an electric actuator that drives the lid member between a closed position and an open position, and At the time of implementation, the electric actuator continues to generate a pressing force that presses the seal member toward the opening by the lid member during a predetermined period, and the pressing force by the electric actuator is not applied during the predetermined period. And a control unit for stopping the generation of.本発明の内視鏡洗浄消毒装置は、開口部を有する処理槽内において、内視鏡に対して処理を実施する内視鏡洗浄消毒装置であって、前記開口部を開閉する蓋部材と、前記蓋部材が閉位置に位置している状態において、前記蓋部材及び前記処理槽によって挟持されるシール部材と、前記蓋部材を閉位置及び開放位置の間で駆動する電動アクチュエータと、前記処理の実施時には、所定の期間において、前記電動アクチュエータによって、前記蓋部材によって前記シール部材を前記開口部に向かって押圧する押圧力を発生させ続け、前記所定の期間以外では、前記電動アクチュエータによる前記押圧力の発生を停止する制御部と、を具備する。
