The medical stent (1) is formed in a tubular shape along the longitudinal axis, and includes a first rigid portion (20) having a predetermined rigidity with respect to a compressive force in the radial direction, and the first rigid portion (20). A main body (10) having a low rigidity and a second rigid portion (30) formed in a tubular shape along the longitudinal axis and connected to the base end portion of the first rigid portion (20) substantially coaxially； The second rigid portion (30) is provided in the second rigid portion (30) for locking to the tissue, and is continuous with the second rigid portion (30) at a substantially central position in the direction along the longitudinal axis of the second rigid portion (30). And a locking member (40) having a base end portion (42) and an extending portion (41) extending from the base end portion (42) to the radially outer side of the main body (10).医療用ステント（１）は、長手軸に沿って管状に形成され、径方向への圧縮力に対して所定の剛性を有する第１剛性部（２０）と、前記第１剛性部（２０）より低い剛性を有し前記第１剛性部（２０）の基端部と略同軸に連なり前記長手軸に沿って管状に形成された第２剛性部（３０）と、を有する本体（１０）と、組織に係止させるために前記第２剛性部（３０）に設けられ、前記第２剛性部（３０）の前記長手軸に沿う方向における略中心位置において、前記第２剛性部（３０）に連なる基端部（４２）と、前記基端部（４２）から前記本体（１０）の径方向外方に延びた延部（４１）と、を有する係止部材（４０）と、を備える。
