An occluder for occluding a passage in the body, particularly in the left atrial appendage, said occluder comprising a plurality of elongate members (1), each elongate member (1) having a first end and a second end The first end is held in or attached to the first holding part (2), and the second end is the second holding part (3). The plurality of elongated members (1) extend between the first and second holding portions (2, 3) independently of each other, and are attached to the second holding portion (3). The elongate member (1) is an occluder in which at least a part of these lengths are collectively covered by at least one jacket (6, 7, 6 '). When the first ends of the plurality of elongated members (1) are moved closer to the second ends of the plurality of elongated members (1) by moving the two holding portions relative to each other, the at least one At least one of the jackets (6, 7, 6 ′) limits the bending motion of the plurality of elongated members (1). The occluder according to the present invention uses a well-known expansion structure that can be easily handled, whereby the movement of the plurality of elongated members is limited by at least one jacket covering the plurality of elongated members. The plurality of elongated members and other parts of the occluder may be made from a bioresorbable material. [Selection] Figure 6b体内、特に左心耳内の通路を閉塞するためのオクルーダーであって、前記オクルーダーは複数の細長部材（１）を含み、各細長部材（１）は第１の端と第２の端を有する長さを有し、前記第１の端は第１の保持部（２）内に保持され又は第１の保持部（２）に取り付けられ、前記第２の端は第２の保持部（３）内に保持され又は第２の保持部（３）に取り付けられ、前記複数の細長部材（１）は互いに独立に前記第１及び第２の保持部（２，３）の間に延び、前記複数の細長部材（１）は、少なくともこれらの長さの一部を、少なくとも１つのジャケット（６，７，６’）によってまとめて覆われるオクルーダー。前記２つの保持部を相互移動させることにより、前記複数の細長部材（１）の第１の端を前記複数の細長部材（１）の第２の端に接近させたときに、前記少なくとも１つのジャケット（６，７，６’）の少なくとも１つが、前記複数の細長部材（１）の屈曲動作を制限する。本発明にしたがったオクルーダーは、容易に取り扱うことができる周知の拡張構造を使用し、それにより、複数の細長部材の動作は、複数の細長部材を覆う少なくとも１つのジャケットにより制限される。オクルーダーの前記複数の細長部材及び他の部品は生体再吸収性材料から作製されてもよい。【選択図】図６ｂ
