Introduction: A School achievement of children is an important preoccupation of parents. Parents’ behavior and their demographic status may affect children learning potentials and mental health.

Methods: Two hundred seventy five of 4th grade students of Isfahan City, central Iran and their parents were studied for association between the last year school average of children and aggression trends of parents by aggression questionnaire scale (AGQ). Findings were analyzed by Pearson correlation scale, t-student, ANOVA, and regression under SPSS.

Results: We found negative significant correlation between maternal aggression and their children school marks (P=0.01) but this was not statistically significant in case of fathers’ aggression. Fourty two percent of children school achievement could be predicted by their parents’ aggression and demographic status.

Conclusion: Maternal aggression and demographic status of parents are important and predictive factors in school achievement of students.

 Hakim Research Journal 2009 11(4): 33- 37.