It is intended to provide a stent to be placed in the living body which exhibits excellent extension properties even in a flexion site of a lumen in the body and shows a low restenosis rate after being placed in the living body. A stent to be placed in the living body characterized in that, as one of the characteristics thereof, the stent is in a long and thin tubular shape having both termini, the long and thin tubular body can be extended in the radial direction from the first diameter in the compressed state to the second diameter in the extended state, the stent has a first terminal section, a second terminal section, a third central section, a fourth section located between the first terminal section and the third central section and a fifth section located between the second terminal section and the third central section, the rigidity of the fourth section is lower than the rigidity of the first terminal section and lower than the rigidity of the third central section, and the rigidity of the fifth section is lower than the rigidity of the second terminal section and lower than the rigidity of the third central section.