SELF-EXPANDABLE STENT

PROBLEM TO BE SOLVED: To provide a self-expandable stent having a favorable coverage and a prescribed or more expansion force and being flexible in the axial direction. SOLUTION: This self-expandable stent 1 has a plurality of wavy-line annular bodies 2 in the axial direction. Each of wavy-line annular bodies 2 except for those in one end and the base end of the stent 1 is provided with: a first common line section A1 and a second common line section A2 positioned in one end side; a third common line section A3 and a fourth common line section A4 positioned in the other end side; a first curved line section 21a connected to the first common line section and the third common line section; a second curved line section 22a connected to the third common line section and the second common line section; a third curved line section 23a connected to the second common line section and the fourth common line section; and a fourth curved line section 24a connected to the fourth common line section and the first common line section: wherein two of the four curved line sections have the same number of curved portions and the shapes in inversion are almost same, the other two of the four curved line sections have the same number of or different number of curved portions from the number of the curved portions of the two curved line sections and the shapes in the inversion are almost same. COPYRIGHT: (C)2008,JPO&INPIT