The purpose of this study is to develop an on-the-job training programs for new teachers at school level. First, the analytical framework was developed through the analysis of previous research on the competencies required for new teachers and teacher training programs and practices. Implications obtained through the case analysis were reflected in the development of an on-the-job training programs for new teachers. By applying the program we reached the following conclusions: First, the program needs to focus on classroom activities. Relatively light burden of administrative work need to be assigned for new teachers to spend more time on the training. Second, the designation of mentor teachers is very important. Mentor teachers should be qualified for helping new teachers’ adaptation and growth as teaching professionals. Third, it is important to build a professional community for sharing experiences and finding new ideas such as a same grade level teachers meeting.