The present invention is to realize that a kind of logical fluidity is not easy to decrease over time, and can inhibit the water-absorbing resin material of coloring. Water-absorbing resin material (particle shape absorbent) system of the present invention is with the polycarboxylic-acid water-absorbing resins with crosslinked configuration of the gained of polymerization of unsaturated monomers containing acidic group as principal component, and contain polyvalent metal salt cation (being preferable to adhere to the particle surface of what water-absorbing resin material), the ratio of multivalent metal cation other than iron cation accounts for 0.001 ~ 1 mass % of water-absorbing resins, and the amount of iron cation accounts for the 5.00 mass % or less of the multivalent metal cation other than iron cation.本發明為實現一種通液性不易隨時間經過而降低，且能抑制著色之吸水性樹脂組成物。本發明之吸水性樹脂組成物(粒子狀吸收劑)係以含酸基不飽和單體聚合所得之具有交聯構造之聚羧酸系吸水性樹脂做為主成分，並含有多價金屬鹽陽離子(以附著於吸水性樹脂組成物之粒子表面為較佳)，鐵陽離子以外之多價金屬陽離子之比例佔吸水性樹脂之0.001~1質量%，且鐵陽離子之含有量佔鐵陽離子以外之多價金屬陽離子之5.00質量%以下。
