A fiber distributor is used for air-laying fibers on an endless, air pervious forming wire in a plant for producing non-woven webs. The fiber distributor includes a forming head with a perforated bottom and rows of rotatable wings situated at a distance above the bottom for during production sweeping supplied fibers along the rows of wings in an air stream before they successively leave the forming head through the openings of the perforated bottom for being deposited in a layer on the upper part of the forming wire. The fibers are, while being swept along in this way, inclined to form nits. The wings are therefore adapted to rotate with an optimal speed of rotation in an interval where the fiber's inclination to form nits changes from being lesser to being larger when the rotation speed of the wings grows. By use of the method and the fiber distributor according to the invention, it is possible to produce non-woven webs with a minimum of fiber loss in form of nits and at the same time also with an extremely high rate of production.
