PROBLEM TO BE SOLVED: To provide a method for producing a water-absorbing resin which is reduced in odor in water absorption, and has little micropowder and coarse powder and to provide a water-absorbing resin and a water-absorbing body obtained by the same.SOLUTION: The method for producing a water-absorbing resin by reversed-phase-suspension polymerizing a water-soluble ethylenically unsaturated monomer includes the steps of: (1) carrying out a first-stage reversed phase suspension polymerization of the water-soluble ethylenically unsaturated monomer in a petroleum hydrocarbon dispersion medium in the presence of a surfactant and/or a polymer protective colloid by using a radical polymerization initiator (2) carrying out a second-stage reversed phase suspension polymerization by adding a second-stage water-soluble ethylenically unsaturated monomer aqueous solution containing a radical polymerization initiator to the reaction mixture whose first-stage reversed phase suspension polymerization has been completed in the state that the surfactant and/or the polymer protective colloid is dissolved in the petroleum hydrocarbon dispersion medium and (3) cooling the reaction mixture subjected to second-stage reversed phase suspension polymerization, to deposit at least part of the surfactant and/or the polymer protective colloid, and carrying out a third-stage reversed phase suspension polymerization by adding a third-stage water-soluble ethylenically unsaturated monomer aqueous solution containing a radical polymerization initiator. There are also provided a water-absorbing resin and a water-absorbing body obtained by the method.COPYRIGHT: (C)2012,JPO&INPIT【課題】吸水時の臭気が低減され、かつ微粉および粗粉の少ない吸水性樹脂の製造方法、それにより得られる吸水性樹脂および吸収体の提供。【解決手段】水溶性エチレン性不飽和単量体を逆相懸濁重合させて吸水性樹脂を製造する方法であって、(1)界面活性剤および/または高分子保護コロイドの存在下に石油系炭化水素分散媒中、水溶性エチレン性不飽和単量体水溶液を、ラジカル重合開始剤を用いて、第1段目の逆相懸濁重合を行う工程、(2)界面活性剤および/または高分子保護コロイドが石油系炭化水素分散媒に溶解している状態で、第1段目の逆相懸濁重合が終了した反応混合物に、ラジカル重合開始剤を含む第2段目の水溶性エチレン性不飽和単量体水溶液を添加し、第2段目の逆相懸濁重合
