This study aims to analyze the implementation of participatory leadership by the principal in improving teacher professionalism and the quality of education at MA Al-Aziziyah Putri Kapek Gunungsari, West Lombok. This research employed a qualitative approach using a case study design. Data were collected through observation, interviews, and documentation. The data sources included the principal, teachers, staff members, and supporting documents. Data analysis was conducted through data reduction, data presentation, and conclusion drawing. The results of the study indicate that the implementation of participatory leadership by the principal was carried out through involving teachers in decision-making processes, providing motivation, maintaining open communication, and fostering collaboration in the development of educational programs. This participatory leadership had a positive impact on improving teacher professionalism, as reflected in the enhancement of pedagogical competence, work discipline, responsibility, and teachers’ creativity in the learning process. In addition, the quality of education also improved, as indicated by the enhancement of learning quality, student achievement, and the effectiveness of school management. Therefore, participatory leadership by the principal plays an important role in creating a professional and high-quality educational environment.