Abstract: A stent has circular bodies having a wavy-line pattern and arranged side-by-side and coiled elements 15 arranged between the circular bodies that are adjacent and extending in a spiral manner, and apices on opposite sides of the wavy-line pattern of the circular bodies that are adjacent are connected by way of the coiled elements 15. A knob portion 19 is formed at each apex of the wavy-line pattern, and the knob portion 19 includes an extension portion 19a extending in the axis direction and a semicircle portion 19b formed at a tip of the extension portion, and the coiled element 15 is connected with the knob portion 19. A slit is formed at a part of the extension portion 19a of the knob portion 19, and the slit 21 extends in the axis direction from an inner peripheral portion at the apex of the wavy-line pattern of the circular body.