You connect to the open part of abluent object ones in inside the endoscope abluent disinfection device and being the abluent disinfection tube which supplies the liquid on opening circles, at the same time you have part the whole open the liquid soak securely without falling off from the open part. As for the abluent disinfection tube, it is provided in the open part and the aforementioned endoscope abluent disinfection device which are provided in abluent object ones which are accommodated in abluent inside the tank of the endoscope abluent disinfection device being the abluent disinfection tube which is communicated with the sending liquid connector which supplies the liquid, it engages when it possesses the opening in aforementioned abluent object ones, in a state where the tube connector and the aforementioned tube connector which are connected to the aforementioned open part have been connected to the aforementioned open part, the retention section which regulates the movement to the direction which at the same time is alienated from aforementioned open part of aforementioned tube connector and, it possesses.内視鏡洗滌消毒装置内において洗滌対象物の開口部に接続し開口部内に液体を供給する洗滌消毒チューブであって、開口部から脱落することなく、かつ開口部全体を確実に液体に浸漬させる。洗滌消毒チューブは、内視鏡洗滌消毒装置の洗滌槽内に収容された洗滌対象物に設けられた開口部と、前記内視鏡洗滌消毒装置に設けられ液体を供給する送液コネクタと、を連通する洗滌消毒チューブであって、前記開口部に接続されるチューブコネクタ部と、前記チューブコネクタ部が前記開口部に接続された状態において、前記洗滌対象物に隙間を有した状態で係合し、かつ前記チューブコネクタ部の前記開口部から離間する方向への移動を規制する保持部と、を具備する。