Training the spirit of leadership is very important for everyone. It is very useful for us to do everything. The spirit of leadership allows us to get things done or interact with others. There are several ways to cultivate a leadership spirit, one of which is by building self-confidence. Growing self-confidence, we dare to do everything around us. Confidence is a good mood for us. The Leadership Spirit Training to Increase Self-Confidence aims to enable the students of SMA Mayjend Sutoyo SM Medan to develop a leadership spirit through self-confidence. This training lasts for 1 day. This activity engages students with leadership theory, develops leadership and trust through self-discipline, and completes leadership and trust implementation exercises. From the evaluation results, it is clear that the results and benefits of this service activity include discussions on self-management, which can increase understanding in relation to leadership development and self-confidence development in the school environment