For the purpose of providing a flexible implant in a plane direction which prevents a scalp from sinking into an osteotomy line after surgery when joining or reconstructing the bone, implant 1 used for bone joining or reconstruction includes base units 11. The base unit 11 includes a first annular ring 10, a second annular ring 20 positioned opposite the first annular ring, and a first connecting portion 41 connecting the first annular ring 10 and the second annular ring 20. The basic units 11 are linearly linked by a second connecting portion 42 such that a first annular ring row 101 formed by a plurality of the first annular rings 10 and a second annular ring row 201 formed by a plurality of the second annular rings 20 are in parallel, and the basic units form a mesh that is capable of meandering along an osteotomy line.
