A method for treating an implant material having excellent biocompatibility, particularly, a method and an apparatus for treating a dental implant material. A method and an apparatus for treating an implant material having excellent biocompatibility, in which a surface-roughened implant material containing titanium and a titanium alloy is immersed in electrolyzed ozone water, and the electrolyzed ozone water is held at normal temperature, thereby preventing contamination due to adsorption of carbide on the surface of the implant material and imparting hydrophilicity.