ABSTRACT: Character building is oft-studied by many researchers. This study is about Islamic based character education which is very influential on student achievement in both academics and non-academics indicated by behavior that reflects Islamic values. This study is aimed at (1) revealing the implementation process of character education based on Islamic values, (2) revealing the approach taken in realizing the character education program. This study is qualitative. The subject of this study is the principal, vice-principal, teachers, students, parents of SMA CT Arsya Sukoharjo, and SMA Ulya Al-Fatah Wonogiri. The method of data collection is the interview, observation, and documentation. The data validity was tested using the triangulation method. The method of data analysis used the flow analysis technique. The result of this study is: (1) the implementation process of character education started from designing the concept of Islamic based character education which manages students’ characters. Furthermore, teachers realized it in creating Islamic school’s environment, fostering teachers and students through a mentoring model and being included in the curriculum integrated into all subjects; (2) the approach taken in realizing the character education program is curriculum and learning approach, the exemplary approach and the habituation approach. These approaches are packaged in Islamic frames according to Islamic values.