The reestablishment of the democratic order in countries that have experienced the misfortunes of a totalitarian regime that violates human rights implies the adoption of measures aimed at the search for the truth of the facts, the punishment for the agents that cause damage and the reparation of the victims, pillars of Justice Transition. The word truth is then applied in several nuances, it is essential to discuss which conceptions adopted by the Transitional Justice and the Criminal Procedure, in order to choose the appropriate mechanism. This article aims, through a reconstruction of the theoretical debate on the subject, to analyze the conceptions of truth most discussed by the doctrine - truth by correspondence, by coherence and by consensus. In addition, it is proposed to identify which of these views is adopted by the Transitional Justice, especially by the truth commissions, whose purpose is to build a coherent discourse that produces a consensual collective memory on the massive and systematic human rights violations practiced by authoritarian states. The criminal process, in turn, as an instrument of application of criminal law and guarantor of due legal process, seeks to demonstrate a truth evidenced by lawful evidence, through the construction of a coherent legal discourse, under the cover of a legal system of guarantees, so as not to condemn innocents. Despite the apparent similarity in the adopted concept of truth, the legal system requires the observance of a series of procedural rules that prevent the results of the truth commission from being linked to criminal proceedings.