The purpose of this thesis paper is to promote and preserve the principle of the best interests of the child in all situations relating to it, a special emphasis in this paper is given to divorce proceedings. Analyzed the legal sources on the global, regional and national level, which are essential for the legal protection of children's rights. Especially emphasizes the importance of the Convention UN on the Rights of the Child from 1989., as the key international document for the protection of children's rights. Furthermore, closely analyzes the term best interests of the child and compares with the concept of the child's welfare. Then lists the rights and position of children in divorce proceedings and case law which gives a clearer picture of the actual application of the principle of the best interests of the child. In divorce proceedings discussed the issue of shared parental care and the right to meet and socialize with their parents and to what extent the principle of the best interests respected. Principle of the best interests of the child are analyzed, not only in terms of international legal sources, but also from the aspect of Croatian legislation.