This article is devoted to research on the legal nature of disciplinary liability of officers of the Marshal’s Guard. The Author analyzes whether the liability created by the provisions of Chapter 8 of the Marshal’s Guard Act shows all the features of disciplinary liability, or whether it can be considered official (quasi-disciplinary) liability. This assessment will be made on the basis of a scheme developed by criminal law scholars from the University of Silesia. On its basis, the following are the characteristics of disciplinary liability: the court of the brothers; 2) paying it only in cases of violation of the rules of practicing the profession (service), its ethical standards or the adopted procedure; 3) the possibility of imposing a penalty of expulsion from the profession. Moreover, the essence, purpose and functions of the discussed responsibility will be indicated. Later in the article, the Author examines the extent to which the disciplinary liability of the Marshal’s Guard officers meets the requirements set for this type of liability by the norms of national and international public law. This analysis is carried out from the perspective of the guarantee function and the principle of the right to a fair trial. He also evaluates the method of constructing a disciplinary offense and speaks about the necessity to apply analogy under Chapter 8 of the Marshal’s Guard Act.