This research aims to: (1) find out how far the understanding of the headmaster of Elementary Schools/ Madrasah IbtidaiyahMuhammadiyah in Bantul Regency toward School-based Conflict Management; (2) find out conflict characteristics and violence acts againstchildren found in Elementary Schools/ Madrasah IbtidaiyahMuhammadiyah in Bantul Regency; (3) find out anticipatory acts taken by the schools in order to eliminate violence acts against children. The research type chosen by the writer was survey research using quantitative approach combined with qualitative approach to find needed data deeper. This research took place in Bantul Regency having subjects of forty-five (45) Elementary Schools/ Madrasah IbtidaiyahMuhammadiyah in Bantul Regency in the preliminary research and fourteen (14) Elementary Schools/ Madrasah IbtidaiyahMuhammadiyah in Bantul Regency in the advanced research. Based on the research conducted, it can be concluded that: (1) Frequent conflicts occurred in Elementary Schools/ Madrasah IbtidaiyahMuhammadiyah in Bantul Regency are conflicts that are traditionally followed, where conflict is perceived as destructive, such as fighting over toys, fighting, mocking each other, etc even though those conflicts are the common ones done by elementary school students. As for the violence characteristic happened or done by the students against other students in Elementary Schools/ Madrasah IbtidaiyahMuhammadiyah in Bantul Regency is mostly verbal violence;The Headmasters of Elementary Schools/ Madrasah IbtidaiyahMuhammadiyah in Bantul Regency generally have understood about the conception of School-based Conflict Management; (2) The Headmasters of Elementary Schools/ Madrasah IbtidaiyahMuhammadiyah in Bantul Regency highly need socialization or workshops on School-based Conflict Management; (3) Most of the Headmasters of Elementary Schools/ Madrasah IbtidaiyahMuhammadiyah in Bantul Regency have already had their own methods to prevent violence both verbal and physical in their school environment. Keywords: Violence Behavior, Elementary School Children, MKBS