To provide a metal adsorption material facilitating recovery after adsorption and improving adsorption efficiency.

A metal adsorption material includes a hydrophilic polymer compound which is obtained by using a hydrophilic compound containing a carboxyl group and a polymer cross-linking agent as raw materials and which is cross-linked in a fiber form. The hydrophilic polymer compound has the solubility of 80% or less expressed by the following expression (1). Solubility[%]={(M_B-M_A)/M_B}×100 (1), where in expression (1), M_A denotes the mass of the hydrophilic polymer compound dried after being immersed in water, and M_B denotes the mass before being immersed in the water. Polyglutamic acid is used as the hydrophilic compound, and a polymer having an oxazoline group is used as the polymer cross-linking agent.