Objectives The aim of the deliberations is to analyze the indicated ethical rules and referring to them the decisions of the Higher Disciplinary Commission (WSK) and the Higher Disciplinary Court of the Bar (WSD), because deontological rules of conduct constitute one of the most important issues of legal ethics. Material and methods The article entitled "The jurisprudence of disciplinary bodies regarding the observance of deontological rules including attorney-client relations pertaining to the course of his case" was drawn up using the formal-dogmatic and dogmatic-legal method, with elements of the historical and legal method. Results In the verdicts of the Higher Disciplinary Commission and the High Disciplinary Court of the Bar, violations of the Attorney's Code of Ethics or ignoring them are severely condemned and can not be justified. The case law of the Supreme Court confirms the importance of lawyers' moral behavior. Conclusions An attorney is a profession of public trust that requires not only professional knowledge but also - and perhaps above all - a certain ethical level in the performance of its tasks. This element appears to be necessary also in the judgments of the Higher Disciplinary Commission and the High Disciplinary Court of the Bar, where instances of its absence or ignoring are strongly condemned and find no justification. Being an advocate means not only being an educated lawyer, but also being a morally shaped human being, as said prof. Czesław Znamierowski: "an advocate who fulfills a high social function with life-affirming consequences, should stand at a very high intellectual level and be distinguished by the great dignity of the soul."