Abstract : The French Decree of 10 February 2010 which concerned the work that was started by rewriting the DSM and ICD, from trans-identity must be discussed, dealing with the theoretical as well as the "politics" involved. The schism between associations of users, the trans in demand and/or monitoring requirement, and hospital teams specialized in the management of the public, in the case of France in particular has a history closely linked to an alleged social order and its players in terms of gender in a binary vision of society. The application for recognition of knowledge, expertise ground trans-identity were confronted, in the early eighties, with Shield therapy, which can be defined as the ultimate argument of the medico-legal proceedingswhich concerned the subject of the trans-sexual, excluding other topics/trans paths, to render remote any intervention of the political, social sciences and humanities in what has become a theoretical paradigm: sex change is primarily a cultural change of gender. Finally, it is a situation where the medico-legal community attempts to ignore its own politicization and militancy. Split between the will to resist and to participate face/with an inadequate protocol, ineffective and culturally obsolete, the field has produced its own movements calling into question the actual spirit of the method. The trans question has now as many political groups. Theorizing trans finds its legitimacy not only to a return to inequality between men and women, but also to fight within the same movement with all its forms of inequality and stigma. The field of trans-identity has dramatically changed, the tools for understanding as the theoretical paradigm itself, owes something to this change.