(A) which is a polymer of a water-soluble ethylenically unsaturated monomer having at least one acid group, and a polymeric amine compound (B), wherein the water-absorbent resin particles (A) , The degree of neutralization of the acid groups of the polymeric amine compound (B) is 90 mol% or less, and the viscosity of the 0.5 wt% aqueous solution of the polymeric amine compound (B) is in the range of 1 to 500 mPa s.少なくとも１種の酸基を有する水溶性エチレン性不飽和単量体の重合体である吸水性樹脂粒子（Ａ）と、高分子アミン化合物（Ｂ）とを含み、 前記吸水性樹脂粒子（Ａ）の前記酸基の中和度が、９０モル％以下であり、 前記高分子アミン化合物（Ｂ）の０．５質量％水溶液粘度が、１～５００ｍＰａ・ｓの範囲にある、吸水性樹脂組成物。
