Solidaridad Obrera (Spanish for Workers' Solidarity) is a newspaper, published by the Catalan/Balearic regional section of the anarchist labor union Confederación Nacional del Trabajo (CNT), and mouthpiece of the CNT in Spain.
The paper takes its name from an organization of the same name that started in 1907[1] and reorganized the labor movement in Spain based on the structure of the Federación de Trabajadores de la Región Española (FTRE). This name has been used by numerous anarchist periodicals in several countries.
The newspaper Solidaridad Obrera was first published on 19 October 1907, in Barcelona, Catalonia (Spain) as the mouthpiece of the Solidaridad Obrera federation and has been published, in different forms up to today, now consisting of an online version as well as a print-version that has a print-run of 5,000 copies that have been distributed for free since 2005.