The invention concerns a method for fixing a connecting piece (13) to a product (11) made of a composite material. As the connecting piece (13), such a piece is used as forms a shoulder (21) within the joint area (D). Simultaneously with the manufacture of the product (11), the rein­forcing fibres (22) that proceed in the longitudinal direction (A) of the product (11) are guided within the joint area (D) so as to run along a turning path (B) of movement so that the reinforcing fibres (22) turn around said shoulder (21) and return in the opposite direction (C) of progress as unified continuous fibres, whereby, at the same time, both said product (11) of com­posite material and the joint (15) with the connecting piece (13) are formed.