The purpose of this paper is to describe how self-concept of teacher-leaders can influence an achievement. Teacher-leaders are people with special skils. These are manifested by their ability to build trust and rapport, to diagnose, to deal with process, to use resources, to manage the work, and to encourage the development of skills and confidence in others (Lieberman et al, in jossey-Bass Reader, 2000). In reforming the schools, teacher-leaders must have moral leadership and self-concept. Teacher-leaders deal with serious thinking, sense of deeply feeling and actions that reflect moral leadership. it is important that the teacher-leaders promote the self-development in others. At the same time, they must create their beliefs in others, so that the others follow their belief. Then, teacher-leaders, like other educational leaders, have to build a good feeling about a school system.