The present invention provides an absorbent body having at least two or more layers, the absorbent body comprising: a water absorption layer having a water absorption region where a water absorbent resin powder is disposed and a thickness-direction-penetrating opening region and a layer having a diffusion region where a diffusibility improvement material having an under-load liquid passing rate of 15 seconds or less is disposed, as a lower layer of the water absorption layer, wherein the lower layer has the diffusion region disposed at least a part of a portion located below the opening region.本發明中提供具有優異吸收性能之吸收體及吸收性物品。本發明之吸收體為具有至少二以上的層之吸收體,其特徵為,具有配置吸水性樹脂粉末的吸水區域及具備橫貫厚度方向的開口區域之吸水層;及具有至少一部分形成配置荷重下通液速度為15秒以下之擴散性增進材料的擴散區域之層,為前述吸水層之底層;在前述底層中,在位於前述開口區域之下之部分的至少一部分,設置前述擴散區域。1‧‧‧吸收體2‧‧‧吸水區域3‧‧‧開口區域4‧‧‧吸水層5‧‧‧擴散層
