Social entrepreneurship is defined as bringing innovative solutions to social problems. In the study conducted by Guzmán et al., (2024), it is emphasized that social entrepreneurship is a developing concept and that studies on social entrepreneurship should be supported by studies conducted in other sectors, especially in the service sector. It is known that the leadership skills of school administrators influence teacher motivation. However, there are no studies in the literature that reveal how effective the social entrepreneurial leadership characteristics of school administrators are on teachers' motivation. This research was planned to fill this gap in the literature and based on the necessity to determine the effect of the social entrepreneurial leadership characteristics of school administrators on teacher motivation. The universe of this research, designed according to the relational model, one of the quantitative research methods, consists of teachers working in schools located in a region of country X in the 2023-2024 academic year. According to official statistics, a total of 1859 teachers work in this region, and the sample of the research consists of 339 teachers determined by the simple random sampling method. In the study, "Social Entrepreneurial Leadership Scale" and "Teacher Motivation Scale" were used as data collection tools. In the study, the perceived social entrepreneurial leadership and motivation levels of teachers working in the relevant schools were determined according to the variables of the unit, gender, marital status, age, seniority, branch and status of the participants and the relationships between the variables were revealed. The most important findings of the study are that there is a high level of positive relationship between the social entrepreneurial leadership characteristics of school administrators and teacher motivation, and that the social entrepreneurial leadership characteristics of school administrators predict teacher motivation at a high level, positively and significantly. Various suggestions have been made to researchers and policy makers in line with these findings.