Provided are a method and an apparatus for manufacturing a water absorption treatment material in which used grains have excellent clumping strength. A manufacturing apparatus (1) is an apparatus for manufacturing a water absorption treatment material (4) that is composed of a plurality of grains (40) that bond to each other upon absorbing a liquid, and includes a granulation machine (10) and a pressure application machine (20). The granulation machine (10) forms a substantially cylindrical granule that constitutes each of the grains (40) by granulating a granulation material. The pressure application machine (20) applies pressure to the granule formed by the granulation machine (10) from a longitudinal direction of the granule so as to reduce the length of the granule.
