Introduction. Development of cognitive interest of cadets is one of the pedagogical aspects of great importance. Cognitive interest determines the effectiveness of mastering professional and humanitarian disciplines and contributes to the formation of cadets’ personality, aimed at their further self-improvement. Theoretical analysis. The study of modern sources allowed to come to the conclusion that the cognitive interest of cadets, being a quality of the personality, has a direct connection with such a phenomenon as reflexion. Empirical analysis.