In the vapor phase which surrounds the said liquid drop with the polymerization of the liquid drop of the monomer solution, the water insoluble inorganic salt the suspension is done in the aforementioned monomer solution in the method of producing the water absortion power polymer particle which possesses high permeability, the method at the same time the aforementioned polymer particle at least having the average diameter of 150 millimicrons.モノマー溶液の液滴の重合によって該液滴を取り囲む気相中で、高い透過性を有する吸水性ポリマー粒子を製造する方法において、前記モノマー溶液中に水不溶性の無機塩が懸濁されており、かつ前記ポリマー粒子が少なくとも150μmの平均直径を有する方法。