PROBLEM TO BE SOLVED: To ensure cutting oil/machining oil maintaining its performance over a long period to be retained at excellent disposition through preventing its putrefaction with offensive odor due to outbreak of anaerobic bacteria or sulfate-reducing bacteria. SOLUTION: This antimicrobial metallic material has a form of threedimensional netty porous metal sintered compact made from metallic powder consisting of at least one kind among antimicrobial copper, silver and alloy thereof. The sintered compact may be borne on the surface of a stainless steel net or punching metal with the surface and reverse surface communicating with each other. The other objective antimicrobial metallic article is obtained by putting the above sintered compact into a water- and air-permeable reinforcing member 2. This antimicrobial metallic material is obtained by expanding a mixed composition slurry comprising the above-mentioned metallic powder, a water-insoluble hydrocarbon-based organic solvent, surfactant, water-soluble resin binder and water followed by molding, drying, degreasing and then sintering to form a three-dimensional netty porous metal sintered compact.
