Abstract: Method and device for inserting synthetic fibres into a surface, wherein a fibre is unwound from at least one roll. The fibre is transported through a tube to a position under an insertion element by an air flow and is subsequently cut off to a desired length. The fibre is then pressed into the surface by an inserting element. The fibre is cut off by a rotatable element which is rotatable about an axis, which rotatable element is provided with a passage which is co-axial with the tube in a first position of the rotatable element and which includes an angle with the tube in a second position of the rotatable element, in which position the fibre is cut off.