The presented diploma thesis focuses on the attitudes of selected youth political organizations in the Czech Republic towards the European Union and the process of European integration. It takes in account the fact that youth political organizations can be identified as agents of political socialization as well as it is possible to study them within the broader term of political participation (to study their influence on attitudes and opinions of their members). The analysis concerns selected eight Czech youth political organizations, Mladí sociální demokraté (the Young Social Democrats), Mladí konzervativci (the Young Conservatives), TOP tým, Mladé ANO, Mladí zelení (the Young Greens), Mladí lidovci, Mladí křesťanští demokraté (the Young C...