This dissertation soughts to relate Hannah Arendt’s considerations on propaganda and her theory of action, taking into account the corruption of speech through violence and the use of lies as ways of inhibiting politics. Even though Arendt never presented a definition of propaganda, the term is recurrent in her writings, and in many cases is connected with concepts more frequently studied in the author s work, such as violence, action, ideology, and others. The research begins with an approach to the first Arendtian texts with mentions to propaganda, generally related to the ascension and domain of the totalitarian regimes. Next, it discusses the relevance of propaganda within totalitarianism, considering the essential characteristics of this new form of government. The research then goes to the theme of lying, the main concern being the damage that it can have on politics. With the same concern, the dissertation then discusses what we are naming speech violence, which means the perversion of speech through propaganda. In the last part, the dissertation brings Arendt s concerns to current days, drawing relations between the philosopher s work and some contemporary thinkers who discuss the current information and trust crises.