The following are provided: a water-absorbent resin in which, in the formation of an absorbent material forming an absorbent article, dispersion is satisfactory even in a moisture absorption state, which prevents the occurrence of troubles at the time of manufacturing of the absorbent article and which allows efficient manufacturing and an absorbent article using an absorbent material containing the water-absorbent resin. The water-absorbent resin according to the present invention is obtained by polymerizing a water-soluble ethylenically unsaturated monomer and performing post-crosslinking thereon with a post-crosslinking agent, and the water-absorbent resin satisfies the requirements below: (A) yellow index is 5.0 or less and (B) gel strength is 1800 Pa or less.本發明提供一種吸水性樹脂及使用吸收體而成的吸收性物品,該吸收體包含該吸水性樹脂;其中,該吸水性樹脂,當形成用以構成吸收性物品的吸收體時,即便在吸溼狀態,分散性亦良好,並且可防止在製造吸收性物品時發生問題,而能夠有效率地製造。關於本發明中的吸水性樹脂,其是藉由使水溶性乙烯性不飽和單體進行聚合,並且利用後交聯劑進行後交聯來獲得,其中,該吸水性樹脂的特徵在於滿足以下的要件:(A)黃色度是5.0以下、(B)膠體強度是1800Pa以下。
