ProblemTo provide a method for easily producing an adsorbing material used for the removal and recovery of metals and ions in a solution, which is highly durable and has various adsorptive functional groups and forms applicable for various purposes.Means for ResolutionA polymer adsorbent for metals and ions, which is highly durable and has various adsorptive functional groups and forms applicable for various purposes, is produced by a) preparing a reactive polymer having a large number of halogenated alkyl groups or glycidyl groups in the molecule, b) preparing a base material polymer insoluble in water and alcohols, c) dissolving the reactive polymer and the base material polymer in an organic solvent to give a mixed solution, d) removing the organic solvent to give a solid carrier in a desired form, and e) allowing a halogenated alkyl group or a glycidyl group in the solid carrier to react with an amine compound having a functional group capable of adsorbing metals and ions, thereby introducing an adsorptive functional group.