Provide a defective hole closure material that realizes minimally invasive treatment with almost no possibility of distant malfunction for atrial septal defect. The defective hole closing member (100) is formed by two tubular bodies (a first tubular portion (110) and a second tubular portion (120)) of a braided texture of a bioabsorbable material, and is of an hourglass shape, Shaped, double spindle shaped or peanut shaped. When the cord (140) is pulled toward the first end (112) side by securing the first end part (112) and the second end part (122) which is the other end part, the tube diameter is expanded Or the first tubular part (110) and the second tubular part (120) come close to each other around the substantially central part (130).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。 欠損孔閉鎖材(100)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(110)および第2の筒部(120))により形成され、砂時計型、8の字型、2連の紡錘型またはピーナッツ型の形状を備える。第1の端部(112)を固定して他の端部である第2の端部(122)を第1の端部(112)側へ紐(140)を引っ張ると、筒径が拡張されたり、略中央部(130)を中心にして第1の筒部(110)と第2の筒部(120)とが接近したりする。
