From a political identities sociology, this paper analyzes three dissidences of the argentinian Montoneros organization wich emerged in completely dissimilar moments and with different characteristics. These dissidences are "Montoneros Columna Jose Sabino Navarro" 1972, the "Juventud Peronista Lealtad" in 1974 and the "Peronismo Montonero Autentico" in 1979. This paper studies these dissidences practices, documents and publications in order to carry out three contributions: a) to make a contribution on the ways of communication of the latinamerican insurgent groups of the second half of the twenthieth century; b) to shed light on some of the ruptures that Montoneros suffered in it interior, trying to elaborate general arguments about the processes of constitution of the Montoneros dissidences; and c) to investigate the way in wich the National Direction and the rest of the Montoneros group managed the internal criticisms, challenges and ruptures, and, at the same time, sustained disciplinary mechanisms.