Agent for treating metallic surface, surface-treated metal material and coated metal material

The invention (i) an aluminum salt and an inorganic metal particles, and aluminum, oxygen, these two aluminum containing at least one element other than the at least one of an inorganic oxide containing, (ii) other than aluminum salt (iii) The compound (iv) a resin and / or to contain a precursor thereof, wherein (i) In the case of an aluminum salt and an inorganic metallic particles in / element equivalent ratio of aluminum not containing chromium, which is not less than 0.1-free metal surface treatment agent, whereby the surface-treated metal material, the metal coating material, to a surface of a metal material.