This study aims to determine the role of teacher dedication in improving the quality of education. Furthermore, the role of teacher dedication is expected to be concluded how important the role of teacher dedication is in improving the quality of education, as well as knowing the obstacles of teachers in improving the quality of education. This research was conducted in the form of field research. The book which is used as the main guideline in this research is 1) "Spiritual Teaching" (contains the teacher's dedication to his work), written by Abdullah Munir, 2) "Quality and Competitive Education" by Dedi Mulyasana. This research uses qualitative research, data collection is done by interview, observation and documentation. The results showed that Madrasah Aliyah Negri 1 Suruh has dedicated teachers. The form of dedication is 1) There is a sense of willingness of teachers to always sacrifice both the sacrifice of energy, thought and time in order to improve the quality of education, 2) The growth of the desire of teachers to provide the best in improving the quality of education, 3) Teachers Teachers S indirectly have strong soul in improving the quality of education. Besides Madrasah Aliyah Negeri 1 Kabupaten Semarang also has a good quality of educational education. This can be observed from the results of increasing academic achievement obtained from year to year. While non-academic achievement is seen from the change in attitude of students who experience changes in attitude for the better. however, in improving the quality of education against the obstacles faced by teachers. These obstacles are the lack of students learning, the distance from the teacher's house to the school is quite far, the lack of respect for students to teachers and differences in the basic knowledge of religion students have. Then the existence of dedicated teachers in Madrasah Aliyah Negeri 1 Kabupaten Semarang has an impact on the quality of Education.