The first part of this thesis introduces the institutions of the European Union which are responsible for consumer protection. Their powers are explained on the process of formation of the Directive on Consumer Rights. Institutional structure of the European Union is completed by the Court of Justice of the European Union and its activities regarding the preliminary ruling. The end of this part compares the chosen judgements of the Court and the Advocate General's opinion concerning consumer protection. The aim of the second part of this thesis is to explain the cooperation between both Czech authorities and authorities of other member states, as well their connection to institutional structure of the European Union. The process of cooperat...