< Topic >The medical instrument whose it is possible past compared to suppress the generation of the crack and burble, is offered.SolutionsAt least, in order for the backing material formation to cover the surface of 10 where the surface consists of the metallic materials and backing material formation 10, sutento which has with the 2nd DLC formation 16 where it is formed, in order for the carbon compound formation to cover the surface of 12 which at least includes the metal of 1 genera and carbon compound formation 12, it is formed, in order the 1st DLC formation 14 which is not included and, to cover the surface of 1st DLC formation, is formed fluorine, includes fluorine. It designates the surface free energy of carbon compound formation 12 as A1, designates the surface free energy of 1st DLC formation 14 as A2, when designating the surface free energy of 2nd DLC formation 16 as A3, in order to satisfy formula A1>A2>A3 , it is constituted.< Choice figure >Drawing 2【課題】クラック及び剥離の発生を従来よりも抑制することが可能な医療器具を提供する。【解決手段】少なくとも表面が金属材料からなる基材層10と、基材層10の表面を覆うように形成され、少なくとも1種の金属を含む炭素化合物層12と、炭素化合物層12の表面を覆うように形成され、フッ素を含まない第1のDLC層14と、第1のDLC層の表面を覆うように形成され、フッ素を含む第2のDLC層16とを備えるステント。炭素化合物層12の表面自由エネルギーをA1とし、第1のDLC層14の表面自由エネルギーをA2とし、第2のDLC層16の表面自由エネルギーをA3としたとき、式「A1>A2>A3」を満たすように構成されている。【選択図】図2
