The aim was to develop and validate an addictive behaviors screening tool in school children. METHODOLOGY: A cross sectional study including a self administrated 223 item questionnaire developed in Arabic language. The questionnaire included identification of the student and seven life domains: school, family, addiction, relationships with peers, leisure and well being, risky behaviors and personality traits. N=854 high school children. of Monastir City. RESULTS: the questionnaire Alpha Cronbach's Coefficient ranged between 0.3 and 0.8. Only items with a coefficient higher than 0.6 were maintained in the final version. The time reliability by using the Bland and Altman method 15 days after the first measure showed a Pearson's coefficient of 0.81. Validity evaluated by principal components analysis led to 3 independent factors consisting respectively in 20, 4 and 3 well correlated items: family, school and risky behaviors. CONCLUSION: validated version of the questionnaire consisted in 102 items, easy to read and understand. This version doesn't require much time to be filled in and takes into consideration cultural particularities of the school children of Monastir. It could be considered as an interesting tool for both the assessment and the prevention of addictive behaviors in school.