Introduction: Preterm birth has been associated with a high frequency of developmental disturbances and risk for long-term cognitive, affective and behavioral problems. Therefore, the goal of this study was to compare the level of mood disorders and anxiety symptoms, as well as behavioral disorders including hyperactivity/attention deficit problems, and oppositional defiant problems, and to compare the conduct problems between Preterm and term children at elementaryschool age. Methods: The research had a causal-comparative approach. Of the 260 of 400 parents who responded, 215 had full reports on Child Behavioral Checklist and obstetric conditions questionnaire; 27 Preterm children were compared with term counterparts, who were paired according to gender and age. Data were analyzed using SPSS (version 20), descriptive statistics and multiple-way analysis of variance (MANOVA). Results: The results of this study showed that, children who were born Preterm had significantly higher levels of affective disorder, anxiety disorder, attention-deficit/hyperactivity disorder, oppositional defiant disorder and conduct disorder scores compared with the controls. Conclusions: Preterm birth is associated with affective and behavioral problems. Together with the results of our study, these findings suggest that mechanisms linking early environment with laterlife susceptibility to clinical outcomes might include mechanisms leading to shorter gestation age.