Abstract: A propelling head for the pneumatic propelling of a multifilament tow, e.g., for use in the filling of textile or network bags, hoses, sacks, or bed cover channels for padding or insulating purposes, has a rear end through which the tow enters and a front end through which the tow is propelled by means of air injected into the head in such a manner as to produce a flow of air directed towards and out of the front end. Behind the zone of injection of air the head is closed with the exception of a tow engaging hole which fits closely around the tow entering the head to prevent or reduce the escape of air through the rear end of the head.