To provide a method for producing a water-absorbing resin through such a process that a solvent is removed from a suspension of the water- absorbing resin obtained by suspension polymerization to obtain a water- absorbing resin cake so as not to cause resin particle aggregation, thereby enabling desired resin particles of low residual solvent content to be obtained efficiently.

This method comprises the following process: an aqueous solution of a water-soluble monomer intended for the objective water-absorbing resin is suspended in a hydrophobic organic solvent using a dispersant and subjected to reversed-phase suspension polymerization in the presence of a water-soluble radical polymerization initiator; and from the resultant suspension of the water-absorbing resin thus formed, the solvent is separated using a solid/ liquid separator of either gravitational, vacuum or pressure filtration type to obtain a cake of the objective water-absorbing resin.