Abstract: The purposes of this research is to determine the leadership factors that effect and predict teacher’s development in a non formal education institution in Jakarta. After finding the result of this research, institution leader and the management could utilize the information to enhance teacher’s development in institution. This research is supported by qualitative and the quantitative research that will lead to communicative are significantly related to employee development. Based on this research, it can be determined which leadership factor that predicts teacher’s development in institution.