European Parliament is one of the basic institutions of the European Union. Also, the parts of that grout are the Council of the European Union, European Commission, European Council and the European Court of Justice. All these institutions work in ahead defined legal frame. The roots of the idea of the European Parliament can be seen in 1951. After that, this institution starts to develop. In 1979, there were first general and immediate elections to elect representatives and with the Treaties of Maastricht, Amsterdam and Lisbon, European Parliament get the expanded authorization so this institution now is the body that fully participates in the process of decision- making and co- deciding. Except for the better life of the European citizens, the Parliament fights also against the discrimination, inequality, poverty, terrorism and for the human rights. In the republic of Croatia, the process of election is assigned by law. In the 2014 elections the coalition with HDZ Party at the head got the biggest percentage of votes.