Problem to be solved: to provide a defective hole closure material for the treatment of atrial septal defect, which is possible to realize a low invasive treatment with little possibility of a distant period.The defect hole closure material is formed of two cylindrical bodies (first and second cylindrical portions) of the braided structure of the bioabsorbent material, has a hourglass shape, and has both ends engaged with the first end and the second end, and the second end side through the substantially central portion from the first end side The first spring portion and the second cylinder portion are provided with a spring spring 140.A first porous layer is provided on the substantially central side of the first cylindrical portion, and a second porous layer 162 is provided on the opposite side of the substantially central portion of the second cylindrical portion, and a shape holding member 620 is formed to hold the shape against the force acting on the opposite ends of the defective hole closing member along the longitudinal direction.Selection diagram【課題】心房中隔欠損症に対して、遠隔期の不具合の可能性がほとんどない、低侵襲の治療を実現する欠損孔閉鎖材を提供する。【解決手段】欠損孔閉鎖材は、生体吸収性材料の編み目状組織の２つの筒体（第１の筒部および第２の筒部）により形成され、砂時計型の形状を備え、第１の端部と第２の端部とにそれぞれ両端が係合され、第１の端部側から略中央部を介して第２の端部側まで第１の筒部および第２の筒部の内部に通されたコイルばね１４０を備える。第１の筒部の略中央部側に第１の多孔質層が、第２の筒部の略中央部の反対側に第２の多孔質層１６２が、欠損孔閉鎖材の両端側に長手方向に沿って作用する力に抗して形状を保持する形状保持部材６２０が設けられている。【選択図】図１４
