In the manufacturing method of an absorbent body according to the present invention, the absorbent fiber aggregate and the water-absorbent resin are formed between the first surface and the second surface in a gap smaller than the thickness of the absorbent fiber aggregate. A step of sequentially introducing the first step, wherein at least one of the first surface and the second surface is uneven, and the first surface is moved relatively parallel to the second surface A second step of applying a shearing force to the aggregate of absorbent fibers and mixing the absorbent fibers and the water absorbent resin, and dropping the mixed absorbent fibers and the water absorbent resin. And a third step of sucking and laminating in a recess having a predetermined shape.本発明に係る吸収体の製造方法は、吸収性繊維の集合体及び吸水性樹脂を、第１面及び第２面の間に形成され、当該吸収性繊維の集合体の厚みよりも小さい間隙に順次導入するステップであって、前記第１面及び第２面の少なくとも一方に凹凸が形成されている、第１ステップと、前記第１面を前記第２面に対して相対的に平行に移動させることで、前記吸収性繊維の集合体に剪断力を付与し、前記吸収性繊維及び前記吸水性樹脂を混合する第２ステップと、前記混合された吸収性繊維及び前記吸水性樹脂を落下させ、所定の形状の凹部内に吸引して積層させる第３ステップと、を備えている。
