In a mediatized public sphere, where media have become the vehicle of interaction between the public and its representatives, political actors need to adapt their communicative behaviour to media logic (Mazzoleni & Schulz, 1999). Communication becomes central in the exercise of control over the thematic agenda, as well as in the search for legitimization of political activity by the public. The objective of the subject "Communication in political organizations" is to reflect on political communication challenges’ today and to see how political parties and institutions try to respond to them. This subject will start with an introductory unit where political communication is defined as a discipline (Unit 1) and will continue by explaining how the transformation of visibility (Thompson, 2001) in the mediatized public sphere has given rise to phenomena such as crises, scandals or political conflicts (Unit 2), in which communication plays a key role. Once the framework where political communication is developed at present has been established, Units 3 and 4 will focus on electoral communication and institutional communication strategies.