Abstract: The article deals with a new cognitive construct of mindfulness, strongly discussed in the foreign scientific area. It describes principal characteristics and spheres, in which the development of the given cognitive phenomenon occurs, for example, in spheres of therapeutic approach, philosophical and pedagogical approach, the approach of personal knowledge and development. Based on foreign and national data, the study emphasizes the impact of mindfulness on significant personality structures, such as reflection, thoughtfulness, and personal life satisfaction. At the empirical stage of the study, it checks university students for the correlation between inclination to addictive behaviour and a high level of mindfulness. The sample encompasses 100 university students including 52 girls and 42 boys with an average age of 20.2. For the examination of the proposed hypothesis, the authors use such methods as The Method of Inclination to 13 types of Addiction by G.V. Lozova and the Mindful Attention Awareness Scale (MAAS) by K.W. Brown, R.M Ryan in the adaptation of A.M. Golubev. To verify the data, the authors use methods of mathematical statistics, as well as empirical results obtained in several foreign studies. The authors perform mathematical processing using the SPSS Statistics 6.0 program. In general, the study found that the high level of mindfulness has an inverse correlation with the inclination to addictive behaviour.