Reduction in absorption capacity after long periods is suppressed, the gel layer diffusion resistance is good, the water-absorbing agent the return amount is reduced, the absorbent article comprising a water absorbing agent, and a manufacturing method of water absorbing agent . It is mainly a polyacrylic acid salt-based water absorbent resin is a particulate water-absorbing agent absorption capacity without load is 28g / g or more, and characterized by satisfying the following (a) ~ a (c), particles by Jo-absorbing agent is solved above problem: (A) stirring water soluble component content is 15 to 60 mass% The difference between the static soluble components and the amount of (b) stirring water soluble component amount (stirring water soluble component content - static soluble component amount) is 15 to 50% by weight Is 1.40~10.0g / g / min is (c) diffusion absorption index However, under stirring for saline represents the elution of high molecular weight after 16 hours, the static soluble component content, stirred water soluble component amount, a high molecular weight eluted static to saline after 16 hours represents.長時間経過後の吸収倍率の低下が抑制され、ゲル層拡散性が良好であり、戻り量が低減された吸水剤、該吸水剤を含む吸収性物品、および該吸水剤の製造方法を提供する。ポリアクリル酸塩系吸水性樹脂を主成分とし、無加圧下吸収倍率が28g/g以上である粒子状吸水剤であって、下記(a)~(c)を満たすことを特徴とする、粒子状吸水剤により、上記課題は解決される:(a)撹拌水可溶性成分量が15~60質量%である;(b)撹拌水可溶性成分量と静置水可溶性成分量との差(撹拌水可溶性成分量-静置水可溶性成分量)が15~50質量%である;(c)拡散吸収指数が1.40~10.0g/g/minである;ただし、撹拌水可溶性成分量は、生理食塩水に対する攪拌下、16時間後の溶出高分子量を表し、静置水可溶性成分量は、生理食塩水に対する静置下、16時間後の溶出高分子量を表す。
