This invention provides an absorbable resin particle having an absorbing speed pattern showing a slow absorbing speed in the initial stage, a normal absorbing speed in the middle stage and a fast absorbing speed in the later stage, and further provides an absorbable particle for preventing a rash by using the absorbable resin particle. The absorbable resin particle comprises a crosslinked polymer (A) including a water-soluble vinyl monomer (a1) and/or a hydrolytic vinyl monomer (a2), and a crosslinking agent (b) as essential constituting units. In a swelling volume measuring method for measuring the swelling volume that each gram of the absorbable resin particle absorbs normal saline, a time ratio (t2/t1) of a time period until a swelling volume reaches to 5 ml (t1) to a time period until a swelling volume reaches to 40 ml (t2) ranges from 5 to 20.本發明可提供一種吸收速度圖案為初期緩慢、中期普通、後期快速的吸收性樹脂粒子,並且藉由使用此吸收性樹脂粒子而提供一種不會產生斑疹等問題的吸收性物品。本發明的吸收性樹脂粒子包含以水溶性乙烯基單體(a1)及/或水解性乙烯基單體(a2)、以及交聯劑(b)為必需結構單元的交聯聚合物(A1),並且於每1g吸收性樹脂粒子對於生理食鹽水的膨潤容積測定法中,至膨潤容積達到5ml為止的時間(t1)、與至膨潤容積達到40ml為止的時間(t2)之比(t2/t1)為5~20。
