The right to a fair trial is the most important procedural right within the catalogue of human rights and fundamental freedoms guaranteed by the Croatian Constitution and the Convention for the Protection of Human Rights and Fundamental Freedoms. At the national level, this constitutional right is protected by the Constitutional Court. In the field of administrative law, its role is reflected in reviewing all final judgments and rulings of administrative courts and the High Administrative Court by examining whether individual judicial acts or actions of these courts violated the constitutional right to a fair trial or other human rights or fundamental freedoms of the parties in question, which are protected by the Constitution and international treaties, in particular the Convention. The right to a fair trial guaranteed by Article 29 of the Constitution and Article 6 of the Convention must be practical and effective, not theoretical and illusory. An analysis of Article 6 § 1 of the Convention and the case law of the European Court of Human Rights in Strasbourg shows that the right to a fair trial is a complex right consisting of a series of specific rights and procedural guarantees. All of them are also guaranteed by Article 29 § 1 of the Constitution. However, the Croatian legal order is still not fully in line with specific fair trial requirements stemming from Article 6 § 1 of the Convention and the case law of the European Court.