PROBLEM TO BE SOLVED: To provide absorptive resin particles which are excellent in absorption performance conforming to actual circumstances because of having a quick speed of water absorption by Lockup method, and have a less amount of a residual volatile component without using a decomposable compound such as urea, and to provide a method for producing the same.SOLUTION: There are provided absorptive resin particles which contain a water-soluble vinyl monomer (a1) and/or a hydrolyzable vinyl monomer (a2) converted into the water-soluble vinyl monomer (a1) by hydrolysis, and a crosslinking agent (b), as essential constitutional units, and porous hollow particles (B), where an absorption speed by Lockup method is 25-80 g/min； and a production method including obtaining the crosslinked polymer (A), and then mixing the porous hollow particles (B).SELECTED DRAWING: None【課題】Ｌｏｃｋｕｐ法における速い吸水速度を有することで実状に即した吸収性能に優れ、しかも尿素等の分解性化合物を用いずに残存揮発成分量の少ない吸収性樹脂粒子、及びその製造方法を提供する。【解決手段】水溶性ビニルモノマー（ａ１）及び／又は加水分解により水溶性ビニルモノマー（ａ１）となる加水分解性ビニルモノマー（ａ２）、並びに架橋剤（ｂ）を必須構成単位とする架橋重合体（Ａ）、並びに、多孔質中空粒子（Ｂ）を含み、かつＬｏｃｋｕｐ法による吸収速度が２５～８０ｇ／ｇ／分である吸収性樹脂粒子：架橋重合体（Ａ）を得た後、（Ａ）と多孔質中空粒子（Ｂ）を混合する工程を有する製造方法。【選択図】 なし
