Patent ID: 8052740

Claim:
A stent comprising: a plurality of annular units each made of a linear portion which extends circumferentially while folding in a zigzag manner and which is connected annularly; and connection portions which axially connect the annular units with each other, wherein at least one of the annular units is provided with an elliptically shaped frame portion midway between a folded portion and a next folded portion in the linear portion located in a predetermined circumferential position, wherein the linear portion connected to the frame portion is connected tangentially to opposite outer circumferential portions of the frame portion so that an angle of each folded portion becomes as small as possible, wherein a radiopaque marker is fitted and fixedly attached to the frame portion, wherein the frame portion provided midway between the folded portion and the next folded portion in the linear portion comprises an elliptic shape with a major axis and a minor axis, and wherein a direction of the major axis is disposed substantially along a length direction of the linear portion, the length direction extending substantially between the folded portion and the next folded portion.