An apparatus that manufactures an absorbent body includes: a sheet supplying mechanism that reels out and supplies a sheet from a sheet roll made by reeling up the sheet in a roll shape a crusher that crushes the sheet into a fibrous matter by scraping a reeling-out tip end of the reeled out sheet and a fiber stacking device that forms the absorbent body in a predetermined shape by laminating the fibrous matter to be sent out from the crusher, wherein at least two sheet supplying mechanisms are included, when switching a supply of the sheet to the crusher from one to another sheet supplying mechanism, both sheet supplying mechanisms supply the sheet to the crusher over a predetermined period, the predetermined period includes a period in which the one sheet supplying mechanism decreases a sheet reeling-out speed, in correspondence with the period in which the one sheet supplying mechanism decreases the sheet reeling-out speed, the other sheet supplying mechanism increases a sheet reeling-out speed.
