This apparatus for manufacturing an absorbent body is provided with a conveyance unit (2) for conveying an aggregate (101) of absorbent fibers and a water-absorbent resin (102), a mixing unit (3) for receiving the aggregate of absorbent fibers and the water-absorbent resin conveyed by the conveyance unit and mixing the absorbent fibers and the water-absorbent resin, a chamber part (4) having an internal space (40) into which the absorbent fibers and the water-absorbent resin mixed by the mixing unit fall, a layering part (5) disposed below the chamber part and having a recess (531) in which the absorbent fibers and water-absorbent resin that fall inside of the chamber part are layered, and a suction unit (6) for generating a negative pressure inside the chamber part.
