Provided are water-absorbent resin particles that can achieve both an absorption rate under pressure and liquid permeability between swollen gels without lowering water-absorbing performance. The present invention has a crosslinked polymer (A) of a monomer composition containing a water-soluble vinyl monomer (a1) and / or a hydrolyzable vinyl monomer (a2) and an internal crosslinking agent (b), and comprises at least one Water-absorbent resin particles having a structure cross-linked by a surface cross-linking solution containing the surface cross-linking agent (c) of (a) and having a water-soluble content of 10% or less, and having a water-absorbing resin particle size of 0 measured by the Demand Wetability test method. The physiological saline absorption under a pressure of 0.3 psi is 3-9 g / g after 60 seconds, 8-15 g / g after 120 seconds, 12-30 g / g after 180 seconds, and 20-30 g after 300 seconds. / G of water-absorbent resin particles.吸水性能を低下させることなく、加圧下での吸収速度及び膨潤ゲル間の通液性の両立が可能な吸水性樹脂粒子を提供する。本発明は、水溶性ビニルモノマー（ａ１）及び／又は加水分解性ビニルモノマー（ａ２）並びに内部架橋剤（ｂ）を含む単量体組成物の架橋重合体（Ａ）を有し、少なくとも１種の表面架橋剤（ｃ）を含有する表面架橋液により表面架橋された構造を有し、水可溶分が１０％以下である吸水性樹脂粒子であって、Ｄｅｍａｎｄ Ｗｅｔｔａｂｉｌｉｔｙ試験法で測定された０．３ｐｓｉ加圧下での生理食塩水吸収量が、６０秒後において３～９ｇ／ｇ、１２０秒後において８～１５ｇ／ｇ、１８０秒後において１２～３０ｇ／ｇ、３００秒後において２０～３０ｇ／ｇである吸水性樹脂粒子である。
