Purpose of the work – scientifically substantiate the technology of forming the optimal psychological climate in volleyball to increase the effectiveness of competitive activities of athletes. Material and methods. The experimental studies involved 25 qualified volleyball players - 13 athletes of VC “Orbita‑ZNU-RCYSS” (Zaporizhzhya), main group, and 12 athletes of VC “Polissya-SНSM-ZhDU (Zhytomyr), control group. Analysis and generalization of scientific and methodological literature and the Internet; method “Diagnosis of personality for motivation to succeed” (by T. Ehlers); method “Assessment of moral and psychological climate in the team” (according to L. Lutoshkin); method “Assessment of the psychological atmosphere in the team” (according to L. Zhedunova). Analysis and evaluation of competitive performance indicators. Pedagogical experiment. Statistical analysis. Results. The developed technology of optimization of psychological climate in volleyball contains the corresponding terms of application in a macrocycle of preparation: four consecutive developing complexes of psychological means (exercises, games and trainings). The technology of optimization of the psychological climate in the sports team of qualified volleyball players included specially developed psychological and pedagogical tasks, exercises, situational role-playing games. Interpretation and generalization of experimental research indicators allows us to state that the athletes of VC “Orbita-ZNU-RCYSS” (Zaporizhzhya) in 80% of cases have a tendency to correlate the indicators of optimizing the psychological climate and increase the effectiveness of competitive activities. Conclusions. The developed technology of optimization of psychological climate in volleyball contains the corresponding terms of application in a macrocycle of preparation: four consecutive developing complexes of psychological means (exercises, games and trainings). The technology of optimization of the psychological climate in the sports team of qualified volleyball players included specially developed psychological and pedagogical tasks, exercises, situational role-playing games. Interpretation and generalization of experimental research indicators allows us to state that the athletes of VC “Orbita-ZNU-RCYSS” (Zaporizhzhya) in 80% of cases have a tendency to correlate the indicators of optimizing the psychological climate and increase the effectiveness of competitive activities.