Abstract: A fiber application head and a method for producing parts made of composite materials by means of a corresponding head. The head comprises two application rollers, including a first roller and a second roller, each roller being movably mounted in relation to the main guiding system between at least an active position in which the band is capable of being guided by the main guiding system on the roller, and an inactive position in which the roller is remote from the main guiding system. The head comprises an actuating system able to maneuver the first roller into the active position and the second roller into the inactive position to apply a band by means of the first roller, and to maneuver the first roller into the inactive position and the second roller into the active position to apply a band by means of the second roller.