To provide a polymer molded article having the surface thereon arranged with metal elements.

Being aware that the mixing of a water soluble polymer with a metal salt in a solution results in the forming of a chelate, it is found out that the application of a magnetic field at the time of forming the solution into a film makes the metal salt arrange on the film surface with the metal being the topmost. For example, when a polyvinyl alcohol aqueous solution is mixed with KCL of a mole ratio of 20% or more and is formed in a magnetic field into a film, a polymer film, on which film surface only K is detected and C, O, CL, etc., are not found, that is, which films has the surface covered with only K is given.