It slides this invention and, it offers the medical instrument tool which is superior in characteristic and durability. The backing material and the polyimide membrane (A) and the aforementioned polyimide membrane as many as (A) compared to nitrogen atomic content and/or the high-molecular membrane whose oxygen atomic content is high (B) possessing, The medical instrument tool which portion of aforementioned backing material surface or entirely, possesses the aforementioned high-molecular membrane (B), the aforementioned high-molecular membrane (B) on the aforementioned polyimide membrane it possesses (A).本発明は、滑り性および耐久性に優れた医療用器具を提供する。基材と、ポリイミド膜(A)と、前記ポリイミド膜(A)よりも窒素原子含有量および/または酸素原子含有量の高い高分子膜(B)とを有し、前記基材表面の一部または全部に、前記高分子膜(B)を有し、前記高分子膜(B)の上に前記ポリイミド膜(A)を有する医療用器具。
