This article provides the statement of the problem, the theoretical framework and the methodology of a research project. This project focused on personal characteristic's (leadership, self-efficacy and professional loneliness) that influence the resistance to change of school principals. The theoretical framework is based on Oreg's resistance to change theory (2003), Bass's leadership theory (1990), Bandura's self-efficacy theory (2007) and Peplau and Perlman's loneliness theory (1982). This research seeks to identify the relationships between the leadership, the self-efficacy, the professional loneliness of school principals and resistance to change.