The article is dealing with the principles of administrative procedural law of Serbia but is also of importance from the point of view of European principle of "good administration". Principles of pure administrative procedure and those of administrative dispute are substantially different. But, having in mind succession in the course of administrative procedure and administrative dispute existing connection between principles of two procedures is obvious. While principle of publicity and principle of dispositivity are contrary to each other, as well as the position of the main participants in mentioned procedure, some principles, as principle of legality, principle of reasonable time for decisionmaking, establishing the facts at an oral public hearing, principle of finality, use of language, etc. - make them familiar.