In school, teachers are the most critical factor and should inculcate moral values among their students. This study seeks to identify the factors that support the strategies of Islamic Education teachers in akhlaq (character) building among students in an Islamic Private Secondary School. The research applied qualitative design with in-depth semi-structured interviews; the data were gathered from five Islamic education teachers to explore the supporting factors of teacher strategies of Islamic education and ensure the strengths and weaknesses of these factors. The teachers were purposively selected based on their experiences in teaching and learning. Moreover, the study revealed that the results identified the main supporting factor in the implementing of teacher strategies in Islamic education in akhlaq building among students was the school discipline, co-curricular activities of Islamic school, student (diversity in learning), and teachers as a role model as well as parental involvement in akhlaq building. The finding also asserted that the social environment is one of the supporting factors in implementing teacher strategies of Islamic education in akhlaq building among students. Based on the findings, the researcher recommends the future study, including examining other participants of the school, namely students, staff, principal of school, and parents, to enrich data from different views.