PROBLEM TO BE SOLVED: To provide an indwelling system for preventing the position of an electrode part from being shifted relative to the heart.SOLUTION: The indwelling system 1 includes: a peeling device 10 having a distal end member 12 disposed on a reference axis C a first linear member 13 connected to one side D1 to the reference axis in the distal end member and extended to a proximal end side a second linear member 14 connected to the other side to the reference axis in the distal end member and extended to the proximal end side and an operation part 16 for moving both linear members back and forth respectively along the reference axis a pair of electrode parts 31 connectable to a defibrillation unit 32 which applies a voltage and a housing part 40 which houses the distal end member, both linear members and the pair of electrode parts and has a housing hole 41 provided with an opening 42 on the distal end side. By operating the operation part, the distal end member is projected from and retracted into the opening.COPYRIGHT: (C)2013,JPO&INPIT【課題】心臓に対して電極部の位置がずれるのを防止する留置システムを提供する。【解決手段】留置システム1は、基準軸線C上に配置された先端部材12、先端部材における基準軸線に対する一方側D1に接続され基端側に延びる第一の線状部材13、先端部材における基準軸線に対する他方側に接続され基端側に延びる第二の線状部材14、および両線状部材を基準軸線に沿ってそれぞれ進退させる操作部16を有する剥離装置10と、電圧を印加する除細動ユニット32に接続可能な一対の電極部31と、先端部材、両線状部材、および一対の電極部を収容し、先端側に開口42が設けられた収容穴41を有する収容部40とを備え、操作部を操作することで先端部材が開口から突没する。【選択図】図1