The article focused on the study of religious moderation based on values of moderation in three Islamic boarding schools (Pesantren) in Southeast Sulawesi, namely Pesantren al-Muhajirin Darussalam Konawe, Pesantren Ummu Sabri Kendari, and Pesantren Darul Mukhlisin Kendari. Therefore, a qualitative approach was used with a case study design -the techniques of collecting data used in interviews, participatory observations, field notes, and documentation. Data analysis in this article was done using interactive data analysis by Miles, Huberman, and Saldana. This study found (...) that the construction of religious moderation in the pesantren emerged from the basis of religious textual-scriptural combined with the performance of rationality (reason). This combination emerges to a dialogical pattern of harmony between the text and the context to color the behavior and social actions of the community. Precisely this attitude of religious moderation can prevent residents of Islamic boarding schools from behaving radically both in attitude and thought, so the outputs of pesantren can accept all forms of differences in religion and respect the beliefs believed by others in the community. This attitude of religious moderation in the pesantren also emerges in religious behavior that is tolerant and respectful of differences in society. (shrink)