A manufacturing device for an absorption body including an accumulation portion that is to have accumulated thereto liquid absorbent fiber in a first gas flowing through a duct and a polymer discharge tube that is introduced into the duct and that discharges from a discharge hole a second gas having high-absorbent polymer mixed therein toward the accumulation portion, wherein a flow path of the second gas formed in the polymer discharge tube has at a location on the discharge hole side of the flow path a distribution change area where a distribution state of high-absorbent polymer is changed, and a sectional area of the flow path at the distribution change area is narrower than a sectional area of a flow path at a part adjacent on an upstream side as well as a downstream side of the distribution change area.
