An apparatus for scattering fibrous material, e.g., chips, said apparatus serving to spread chips using either a throw or air-jet spreading method to form a mat (3) of chips onto a moving band conveyor (4) or the like, whereby the scattering process avails a gas flow, such as air flow, for instance; the apparatus having a scattering chamber mounted above the band conveyor or the like. The invention is implemented such that, in order to prevent lateral turbulence, the volume of the scattering chamber's length wherein the major portion of the material being scattered falls onto the band conveyor or the like is at least partially divided into smaller subspaces adjacent to each other in the cross-machine direction by substantially thin plate- like elements (9) set apart from each other in cross-machine direction at a spacing substantially larger than the particle size of the material being scattered.