Today we are facing numerous cases of increasing worsening the international relations. This gives a special role to the foreign politics propaganda. That’s why the successful experience of the propagandist work during the Second World War should not be ignored. This article describes the creation of the Spanish language radio broadcasting system of the Communist International at the beginning of the Great Patriotic War. The broadcasting was implementing via the Radio Espa-na Independiente radio station (also known as Pirenaica), which was illegal in Francoist Spain. This work is primarily based on the documents (that were published or not) of the Communist International fund, which is part of the Russian State Archive of Socio-Political History. Also, some memoirs in Russian and Spanish were used in the research. Today we don’t have a single work (in the Russian and foreign historiography, as well), devoted to the general history of the Soviet radio broadcasting in foreign languages. However, this article helps us to clarify the role of the Communist International in the Soviet foreign broadcasting activities during the war, starting from the middle of July 1941. The Communist International did not just assist to the All-Union Committee for Radiofication and Radio Broadcasting at the USSR Sovnarkom, but at the same time, its own foreign broadcasting was created. And this broadcasting, held on behalf of some illegal secret radio stations located in other countries, aimed at pursuing the interests of the Soviet Union within its information war with Hitler’s Germany and its allies. In general, the Comintern radio broadcasting was a serious Soviet weapon of external policy propaganda.