Provided is technology for effectively removing fiber from a mesh belt. A second web former for conveying a second web containing fiber deposited on a mesh belt 72 having multiple holes 72a has a brush roller 710 with numerous bristles 712 protruding from the surface and disposed in contact with the mesh belt 72. The sectional area of the bristles 712 of the brush roller 710 is smaller than the open area of the holes 72a in the mesh belt 72 so that the distal ends of the bristles 712 can enter the holes 72a.