A metal material having a coating formed by a surface treatment on the surface of the metal material is provided. The coating has an excellent corrosion resistance with or without a further coating that is equivalent or superior to the prior art coating formed by zinc phosphate treatment or chromate treatment, is free from sludge formation or environmentally harmful components, and is formed by using a component capable of deposition with a simple method. A surface-treated metal material having on a surface of a metal material a coating layer formed by a surface treatment, the coating layer containing the following components (A) and (B), wherein (A) is an oxide and/or hydroxide of at least one metallic element selected from the group of Ti, Zr, and Hf and (B) is aluminum; wherein, in the coating layer formed by the surface treatment, the weight ratio K1 (=B/A), which is the weight ratio of the coating weight B of aluminum of the component (B) to the total coating weight A of the metallic element in the component (A), is in the range of 0.001≦K1≦2.