This invention is formed by the abbreviation rod, to the 2nd diameter which is expanded from the 1st diameter which at the same time was compressed being open-ended sutento in radial, aforementioned sutento has the expansion possible abbreviation corrugated component in circumferential direction, in order central position of the inside radius of curvature of the corrugated part in the said abbreviation corrugated component (202) with central position of outer part radius of curvature (201) the line which is tied to become parallel vis-a-vis sutento longitudinal axis direction, is arranged, regards sutento which features that it is the position where at the same time it differs. Be able to lighten the concentration of stress which occurs in sutento according to this invention, due to the big movement and the like of the blood vessel which accompanies the heartbeat of the heart the occasion where it detained to internal, sutento whose heartbeat durability is high is offered.本発明は、略管状体に形成され、かつ圧縮された第1の直径から拡大された第2の直径まで半径方向に拡張可能なステントであって、前記ステントが円周方向に伸長可能な略波形構成要素を有し、該略波形構成要素における波形部分の内側曲率半径の中心位置(202)と外側曲率半径の中心位置(201)を結ぶ線がステント長手軸線方向に対して平行となる様に配置され、且つ異なる位置にあることを特徴とするステントに関する。本発明によれば、体内に留置した際に心臓の拍動に伴う血管の大きな動き等によりステントに発生する応力集中を軽減でき、拍動耐久性の高いステントが提供される。
