The political poster is one of the means of propaganda used by the Romanian communist regime after 1945. First conceived as a graphic work and then imprinted and multiplied, the communist poster represented an instrument used to broadcast the persuasive and manipulator messages, aiming at the adhesion of Romanian population to the politics of the Communist (Labor) Party. The themes and language of this mass-communication agent belong to the totalitarian communication strategy, having a different specificity and a moderate psychological impact compared to other means of totalitarian propaganda. Using poster to spread Marxist-Leninist ideology, but also to popularize "grand achievements of the popular regime" represented only one aspect of the phenomenon of propaganda in Romania. The research of this visual fret instrument is just at the beginning. This study uses different sources of documentation, such as: elective posters, graphic works, economy-based posters, pacifist posters etc., from diverse branches of the University's Central Library "Lucian Blaga", of the National Art Museum and of the National History Museum "Transylvania", all from Cluj-Napoca.