PROBLEM TO BE SOLVED: To easily achieve an implant having compatibility with a bone cell depending on an object person.SOLUTION: Compatibility between an implant and a bone cell is changed depending on a state of a surface of a DLC film. The implant includes a base material, and a diamond-like carbon film formed on a surface of the base material. The diamond-like carbon film contains 0.5 atom% or more of rare gas atom, and the ratio of a carbon-hydrogen bond of its surface to a carbon-carbon bond is 0.6 or more. Thus, the optimum DLC film is obtained depending on an implant object person.