Resumen
The article proposes to analyze the struggle waged by the Unitary Workers Central (CUT) to reform the Labor Code inherited from the chilean civic-military dictatorship. The analysis focuses on two major moments of struggle for labor reforms: 1990 and 1999-2001 because their poor results in terms of the depth of the changes achieved, account for a part of the difficulties that the trade union movement had to represent an influential political role in society and, on the other, the limits of a democratic system impermeability to popular demands for the control mechanisms of popular sovereignty.