In the last years of the 19th century, Anarchism and Socialism were the two main trends in the Argentine labor movement. Debates and discussions were permanent among these two currents. They took place in workplaces, in labor rallies and mobilizations, and especially in the pages of political newspapers. This paper analyzes one of them, previously neglected by labor histography: the debate between Eduardo Gilimón and Alfredo Pasqualetti in early 1898.