Abstract: This research concerns with the Islamic Borading House (pesantren) as the basis for the cultivation of religious values greatly affects the spiritual intelligence of the students. It cannot be separated from the education system and teaching of the pesantren itself. This research aims to explore the role; (1) pesantren curriculum, (2) teaching methods, (3) internal environment in pesantren, in developing spiritual intelligence. This research uses a qualitative approach. The research subjects are caregivers, administrators, teachers and students. Data collection methods used interviews, questionnaires, observation and documentation. The testing the validity of the data is through triangulation of sources and methods. Data analysis used qualitative analysis. The results of this study indicate that spiritual intelligence develops through: (1) School curriculum which implies minor curriculum like tauhid curriculum, and fiqh curriculum, (2) the teaching methods of the pesantren which plays a role to build a peaceful, safe, peaceful atmosphere for students, mutual understanding and respect, (3) the internal environment of the pesantren plays a role in togetherness and religious activities, the quality of the intellectual intelligence of the students also increases with religious activities, and the spiritual level of the students is good.