This study was aimed to examine the roles of teacher and their challenges in developing students' morality. The data was collected from online database including PubMed, Science Direct and Google. The both qualitative and quantitative studies were reviewed and synthesized in a narrative format. There were seven roles of teachers being found in this study. There are moral model, moral mentor, caregiver, moral value conveyer, facilitator, counsellor and communicator. The challenges of teachers in developing students' morality were also discussed in this study. There are method of teaching and evaluation, lack of interest, qualification of teacher, the expectation of parents and society, the distance between school values and family values and communication with parents.