Group psychotherapy represents a significant therapeutic approach in contemporary psychiatric practice, providing support and therapy to patients through group dynamics and processes. This paper explores the theoretical foundations, historical development, key theories, and models of group psychotherapy, analyzing their importance in modern healthcare. Special emphasis is placed on the role of nurses/medical technicians in organizing and conducting therapeutic activities within the therapy team. The analysis conducted in this paper confirms that group psychotherapy offers an effective approach in supporting patients with mental health challenges, promoting their emotional and social functioning. Nurses/medical technicians are pivotal members of the therapy team, providing practical support, organizing therapeutic activities, and contributing to the overall well-being of group members through their specialized skills and knowledge in psychiatry. Further research identifies specific educational and professional qualifications necessary for nurses/medical technicians to successfully participate in group psychotherapy, underscoring the importance of continuous education and training. Ethical principles, confidentiality, and professional norms are highlighted as essential foundations in working with groups, ensuring a safe and ethically acceptable environment for the therapeutic process. Ultimately, this paper provides a comprehensive insight into the dynamics of group psychotherapy, emphasizing its significance in achieving therapeutic goals and improving the quality of life for patients. The integration of nurses/medical technicians into the therapy team is crucial for therapy success and further advancement in psychotherapeutic practice in the future.