Abstract: A water-absorptive resin composition which comprises (A) 5 to 95% by weight of a water-absorptive resin and 95 to 5% by weight of (B) a polyolefin resin and (C) an ethylene/.alpha.-olefin copolymer rubber, based on the total contents of said components (A), (B) and (C), wherein the content of said component (C) amounts to 20 to 80% by weight based on the total contents of said components (B) and (C) is disclosed. This water-absorptive resin composition is moldable and has an excellent water absorption property and an excellent water-absorptive resin retention characteristic after absorbing water.