One of the Millennium Development Goals is to ensure universal access to primary education by 2015. However, primary school dropout remains a challenge in many developing countries. In Chad official statistics report aggregated primary school dropout of 15.6%; 15.0% for boys and 16.3% for girls, survey-based studies have sought to verify these dropout factors for girls in Kélo district. The primary objective of our study is to find out the factors of school girls' dropout at primary in Kélo and check a solution for girls to stay at school as long as possible.Semi structure interview is conducted with parents, students, teachers and administrators of the district in the site.