A structure is realized where effects imparted to an applied face can be improved. A thin film that is applied to an applied face of an application object has front and back faces, of which one is disposed at the applied face side in use, and includes a thin film main member that has biocompatibility, a first functional layer including a first functional component laminated on a front face of the thin film main member, and a second functional layer including a second functional component that differs from the first functional component, layered on a back face of the thin film main member.
