The porous resin particle has a mono (meth) acrylic acid ester having an ethylenically unsaturated group only in the (meth) acrylic acid residue and containing at least one of an ether group and an ester group and a hydroxyl group in the alcohol residue. A polymer of a monomer mixture containing a monomer and a polyfunctional vinyl monomer having two or more ethylenically unsaturated groups, and has a water absorption of more than 400 ml / 100 g to 700 ml / 100 g. The amount is more than 400 ml / 100 g to 700 ml / 100 g.多孔質樹脂粒子は、（メタ）アクリル酸残基中にのみエチレン性不飽和基を有し、エーテル基およびエステル基の少なくとも一方と水酸基とをアルコール残基中に含むモノ（メタ）アクリル酸エステル系単量体と、エチレン性不飽和基を２個以上有する多官能ビニル系単量体とを含む単量体混合物の重合体からなり、吸水量が４００ｍｌ／１００ｇ超～７００ｍｌ／１００ｇで、吸油量が４００ｍｌ／１００ｇ超～７００ｍｌ／１００ｇである。
