When the area is small, detaining to become position and fixed, be able to keep specified position securely, the deficiency closed device whose constitution is simple is offered. In order to close opening Or of one end of deficiency O in the deficiency closed device D which closes the passage condition deficiency O of in vivo, the opening contractile unrestricted 1st component 1 which is provided and, it extends from the connected section 5 which is connected to 1st component 1, the opening contractile unrestricted 2nd component 2 which possesses the salient 7 which projects and, it possesses from opening Ol of the axial direction other edge of deficiency, O this it makes 1st component 1 opening touch Or elastically due to the fact that salient 7 of 2nd component 2 this touches to the oral edge inside of opening Ol elasticallyThing is featured.面積が小さく、留置するときも位置固定的となり、所定の位置を確実に保持でき、構成が簡単な欠損閉鎖デバイスを提供する。生体内の通路状欠損Oを閉鎖する欠損閉鎖デバイスDにおいて、欠損Oの一端の開口Orを閉鎖するように設けられた拡開収縮自在の第1部材1と、第1部材1に連結された連結部5から伸び、欠損Oの軸方向他端の開口Olより突出する突出部7を有する拡開収縮自在の第2部材2と、を有し、第2部材2の突出部7が開口Olの口縁内面に弾性的に当接することにより第1部材1を開口Orに弾性的に当接させることを特徴とする。
