A fiber stacking device (100) of the invention includes a collecting/stacking recess (22) in which a shaped-product material is stacked and which is formed on an outer surface thereof, and stacks a shaped-product material, which is transported on an air stream generated by suction from inside, on a bottom surface (22a) of the recess (22), which is formed on a porous member (27) including a plurality of suction holes, while transporting the recess (22) in one direction. An adjuster (10) is arranged on an inner surface (27b) of the porous member (27). The adjuster (10) includes a plurality of openings, and the area of an opening end portion of the opening relatively distant from the porous member (27) is smaller than the area of an opening end portion thereof relatively close to the porous member.
