When a portion projecting to the outer peripheral portion when it is rounded into a cylindrical shape for mounting the catheter is prevented from occurring, so as to be close to a perfect circle loop shape does not become water droplets form and sends it to the affected area of the vascular stent , to provide a stent that prevents or damaging the inner wall of a blood vessel, that over-thickening and inflammation caused by stress occurs. The stent 1 has a limbal construction pieces 10 of the plurality is formed of a material in a film form, are juxtaposed is connected with the connecting piece 11 at a predetermined interval, the annulus constituting piece 10 is provided on one side a locking portion 14 is passed through to the outer surface from the curved inner surface side to the insertion port 13, the annulus constructed through the insertion port 13 the engaging portion 14 side of the insertion opening 13 is, disposed on the other end piece 10 is made to be circular, while the locked to the locking portion 14 is passed through the curved inner surface of the locking portion 14, and one direction of the direction in which the diameter of the annulus configuration pieces extend its locked position and a lock receiving portion 170 of the plurality of to work only.カテーテルにマウントするため筒状に丸めたときに外周部に突出した部分が生じないようにし、ループ形状が水滴形にならず真円に近くなるようにして、ステントを血管の患部に送る際に、血管内壁を傷付けることや、ストレスによる炎症や過剰肥厚が起こることを防止したステントを提供する。ステント1は、フィルム状の材料で形成され、所要間隔をおいて接続片11で接続されて並設された複数の輪部構成片10を有し、輪部構成片10は一端側に設けられている挿通口13と、他端側に設けられており挿通口13に湾曲内面側から外面側へ通される係止部14と、係止部14側を挿通口13に通して輪部構成片10が輪状となるようにし、係止部14を湾曲内面側へ貫通させて係止部14を係止した状態で、その係止位置を輪部構成片の径が拡張する方向の一方向だけに動くようにした複数の係止受部170とを備えている。
