This article brings up the Força Sindical – FS (Trade Union Force) and the Central Única dos Trabalhadores – CUT (Unified Workers’ Centre) guidelines and actions during neoliberal governments in Brazil from 1990 up to 2015. Its main purpose is to discuss the disputes and alliances between the two mentioned national trade union centres as well as the programmatic changes, including in its basis, considerably motivated not only by the positions taken in face of the neoliberal policies, but also for the kind of relation established with the government in the presented period of time. In order to carry out our analysis, we went through a review about Brazil’s trade unionism studies and checked up congress resolutions of both national trade union centres.