A democratic society at its core must have judicial power as well as a constitutional judiciary. This means that the rule of law cannot be achieved if there is no judiciary as well as a constitutional judiciary that is independent. Constitutional action in the Republic of Croatia is based on the Constitution of the Republic of Croatia (NN 56/90, 135/97, 08/98, 113/00, 124/00, 28/01, 41/01, 55/01, 76/10, 85 / 10, 05/14). The second foundation of democratic activity in the Republic of Croatia refers to the constitutional judiciary and is regulated by the Constitutional Act on the Constitutional Court of the Republic of Croatia (NN 99/99, 29/02, 49/02). In addition to these legal regulations passed outside the Constitutional Court, the Constitutional Court of the Republic of Croatia independently prescribes the Rules of Procedure. The Rules of Procedure define the organization, but also the jurisdiction of the Constitutional Court. The tasks of the Constitutional Court are focused on the protection of constitutional freedoms and the protection of the rights of people, i.e. citizens. After all legal remedies have been used, a lawsuit may be filed with the Constitutional Court if it is considered that the decision of a judicial or executive body, or other bodies with public authority has violated any of the rights guaranteed by the Constitutional Republic of Croatia. The intention of this final paper is to analyze the meaning and importance of the institution of the Constitutional Court in Croatian society.