In recent years, a significant amount of studies have focused on the period of the recent civil-military dictatorship in Brazil. Approaches are manifold and involve various aspects such as consensus between part of society and the state, analysis of authoritarian thinking, action by opposition movements, etc. in this set of approaches, this article aims to analyse the moment of political openness with a view to not only the dissents between the military and the opposition movements organised at that time, but also the internal divergences within the military corporation. In that way, that period would be marked by negotiation. targeted sectors dissatisfied within the armed forces with the conduct of the opening process, but also for the civil opposition which was organised around claims such as the location of the dead and missing persons; the release of political prisoners, return to the rule of law, broad, general and unrestricted Anesty, among others. This is: then, to find elements that make us understand some episodes at the time of political openness, such as: adoption of the Anesty Law, when the actions of different forces have been present in a complex manner and not linear manner in which it is usually assumed.