The relevance of our study is related to the need to help adolescents effectively cope with the challenges of modern society, which is characterised by increased tension, aggressiveness and conflict. The lack of social skills and demonstration of violent ways of overcoming contradictions by adults leads to an increase in conflicts among adolescents. The purpose of our study is the development of conflictological culture in older adolescents. We adhere to Shcherbakova's definition (2010), according to which conflictological culture is an integrative quality of personality, which is based on humanistic values. Its structure is represented by the culture of feelings and thinking as well as behavioural and communicative culture. The sample consisted of 307 adolescents, 16-18 years old, living in Chisinau. To identify the level of development of conflict culture, we used the method developed by Shcherbakova (2011). Based on the obtained data, we developed the program of conflictological culture development. The cognitive-behavioural approach of A. Beck (2017) acts as a methodological basis of the psychological training program. Twelve adolescents, with a low level of conflictological culture development, participated in the training. The following changes were obtained in the study sample: adolescents demonstrate a greater ability to prevent and manage conflicts at all stages; they show a greater readiness for dialogue, the ability to adequately verbalize their own and other people's experiences; and to a greater extent they possess the techniques of assertive communication compared to adolescents from the control group. The obtained results confirm the effectiveness of the program developed by us and the validity of the hypothesis of the study. The novelty and practical significance of our study is determined by the fact that conflictological culture is studied for the first time in our country. Our proposed program for the development of conflictological culture can serve as a basis for educational programs that develop skills to prevent and overcome conflict situations among adolescents.