Judiciary system favourable to children is a relatively new term which we come across in literature relating to the rights of the child. It represents a judiciary system which guarantees respect and efficient implementation of all children’s rights at the highest point, thereby having in mind the level of maturity and the capabilities of the child’s understanding of the subject in matter. Conventions which had a high impact on the mentioned concept are the Convention on the Right of the Child and the European Convention on the Exercise of Children's Rights. Also, the European Council has largely contributed with their Guidelines from the Committee of Ministers about the judiciary system adjusted to meet the child’s needs and rights. The key principles on which such judiciary system can lie are: the principle of participation of the child, the principle of the best interest, the principle of dignity of the child and the principle of the rule of law. In Croatia, the concept of a judiciary system favourable to children is still developing, but the most progress is seen in family law subjects, where the rights of the child and the principles of judiciary system favourable to children are highly accepted, respected and appreciated. The disadvantages of the Croatian judiciary system favourable to children can be seen in misdemeanor proceedings, where the practice of hearing a child and the number of professionals qualified for that significantly differences from criminal proceedings. At last, there should be more work done about strengthening the role of social workers as professionals who can largely contribute to the protection of children who participate in judiciary processes.