Problem to be solved: to provide an accessory case, an accessory case system, and an endoscope reprocessor capable of being managed as an inherent set of an endoscope before the endoscope of the endoscope which has been subjected to the regeneration processing is separated, when the regeneration processing is applied to a plurality of endoscope.SolutionThe accessory case is a first container that accommodates an endoscope attachment, a first supply port disposed in the first container, and connected to a liquid supply port provided in the treatment vessel of the endoscopic reprocessor, and a first connection port which is communicably connected to another attachment case The outlet and the first outlet, which is disposed in the first container and includes an opening for entering and receiving the endoscope accessories in the first container.Diagram【課題】複数の内視鏡に対して再生処理を施した場合に、再生処理済みの内視鏡付属品を分離される前の内視鏡と固有のセットとして管理可能な付属品ケース、付属品ケースシステムおよび内視鏡リプロセッサを提供する。【解決手段】 付属品ケースは、内視鏡付属品を収容する第1容器と、前記第1容器に配置され、前記第1容器を内視鏡リプロセッサの処理槽に設けられた送液口に接続する第1供給口と、他の付属品ケースと連通可能に接続される第1流出口と、前記第1容器に配置され、前記第1容器内に前記内視鏡付属品を出入するための開口を含む第1出入部と、を含む。【選択図】図2