Abstract: A method and device for forming a mat of material containing lignocellulose, which mat is intended to form at least one board, disintegrated material containing lignocellulose being fed to a feeding out unit, and from this being fed in the form of a material flow to a forming unit (200) comprising at least one forming belt (207), the feeding out unit being positioned at a higher level than the forming unit (200). At least one feeding down surface (14) is arranged which extends from the feeding out unit to the forming unit (200), and the transport of material between the feeding out unit and the forming unit (200) is effected by feeding the material downwards along this feeding down surface (14), whereby a controlled material flow is provided between these units.