The research subject is a discredit to internal affairs agencies as a negative social phenomenon threatening both the positive image of internal affairs bodies as a whole, and the honour, dignity and reputation of their particular employees. The research methodology is based on the dialectical approach to the problem under consideration, together with general scientific (formalization, analysis, modeling, and the empirical-inductive method) and theoretical methods of modern social sciences and the humanities (the structural-functional and the systems methods). The empirical part of the research is based on the quantitative and qualitative methods of sociology: the method of focus-groups, the method of narrative interviewing, and the method of sociological questioning which helps to trace back the influence of discrediting on the formation of professional awareness of internal affairs officers. The research helps to identify the most common forms of discrediting of internal affairs officers by citizens and the main mechanisms hampering effective counteraction to discrediting actions of people, and to establish the cause-and-effect relation between discrediting as a negative socio-legal phenomenon and the peculiarities of formation of professional awareness of internal affairs officers. The author concludes that in case if internal affairs officers are lenient with discrediting, their professional awareness becomes deformed which results in the unwillingness to perform their duties properly, the sensation of the absence of the prestige of the profession in the public eye, the prospects of career growth, and the formation of negative attitude towards citizens.