Radially expansible stent

[Subject] A stent extensible to a radial direction formed from a tube is provided. A formation method of such a stent is provided. [Means for Solution] This stent contains a spiral in which a product made from the tube material around which a plurality of winding parts (30, 32) are twisted from the 1st end of a stent to the 2nd end focusing on a length directional-axis line continued. This spiral contains a plurality of Strutt (40, 42) to whom the point of inflection (44) was joined by the way and who is stationed zigzag. Each ストラット contains the 1st length portions (58, 60) and the 2nd length portions (62, 64) of double ベンド (46) which is distant from the point of inflection (44), and both sides of this double ベンド (46). Strutt (40, 42) who adjoined has double ベンド both-hands-related [symmetrical with a mirror image] substantially mutually, and is double ベンド both-hands-related [these], When a stent is making collapse shape, a length portion of Strutt of the double ベンド (46) 1st side who adjoined (58, 60), The 1st side is mutually faced so that it may be brought close and arranged rather than a length portion (62, 64) of Strutt of the double ベンド (46) 2nd side of the side opposite to who adjoined, Strutt of the double ベンド 1st side who adjoined [the], By the way, the point of inflection (44) is joined, and each point of inflection (44) of the 1st side of double ベンド (46) of one winding part (30) of a continuous spiral is arranged among Strutt of the double ベンド (46) 2nd side of the next winding part (32) of a continuous spiral who adjoined. [Chosen drawing] Drawing 2