PROBLEM TO BE SOLVED: To provide a stent in which the displacement after locking up the stent in an affected area in a living body conduit is hard to occur while securing storage capability to a tubular member such as a delivery system.SOLUTION: A stent 1 includes: a stent body 2 braided and formed in a cylindrical shape by fibrous materials, and capable of being deformed from a state of being reduced in diameter to the state of being increased in diameter； and an increased diameter mechanism 3 connected to the stent body 2 and deforming the stent body 2 from the state of being reduced in diameter to the state of being increased in diameter, and maintaining the stent body 2 in a state of being increased in diameter. The stent body 2 includes a first pitch portion 21 disposed at least in the central part of an axial direction, and a second pitch portion 22 disposed in one end side and/or the other end side of the first pitch portion 21 and is braided coarsely more than the first pitch portion 21.SELECTED DRAWING: Figure 1A【課題】デリバリーシステム等の細管状の部材への収納性を確保しつつ、生体管路内の患部にステントを留置した後の位置ずれが起こりにくいステントを提供すること。【解決手段】繊維素材によって円筒状に編み組みされて形成され、縮径した状態から拡径した状態に変形可能なステント本体部２と、ステント本体部２に接続され且つステント本体部２を縮径した状態から拡径した状態に変形させると共にステント本体部２を拡径した状態に維持する拡径機構３と、を備えるステント１であって、ステント本体部２は、少なくとも軸方向の中央部に配置される第１のピッチ部分２１と、第１のピッチ部分２１の一端側及び／又は他端側に配置され第１のピッチ部分２１よりも粗に編み組みされた第２のピッチ部分２２と、を備える。【選択図】図１Ａ
