Background: The purpose of this study was to investigate the relationship between parenting styles and disobedience and aggression in children.

Method: The statistical population of the present study is the mothers of aggressive and disobedient children in Isfahan. Using Cochran's formula, 384 people were selected as a sample and the questionnaires were distributed among them by available sampling method. The validity of the questionnaire was confirmed by professors and experts. Also, the reliability of the questionnaire was calculated 0.82 by Cronbach's alpha test, so the questions had acceptable validity and reliability. SPSS 17 software was used to analyze data received from the questionnaire.

Result: The results of Kolmogorov-Smirnov test showed that the data were abnormal, so Spearman’s nonparametric test was used to examine the research hypotheses. The test results showed that the correlation between the two variables of democratic parenting style and disobedience and aggression in children was confirmed with the coefficient of 0.834 and was accepted with sig = 0.000 and 95% confidence level.

Conclusion: The correlation between the two variables of negligent parenting style and disobedience and aggression of children with a coefficient of 0.117 and sig = 0.024 and 95% confidence level is not acceptable because there is a negative relationship between the two variables of negligent parenting style and disobedience and aggression of children and therefore the H₀ hypothesis is confirmed and the H₁ hypothesis is rejected. The correlation between the two variables of authoritarian parenting style and disobedience and aggression of children was confirmed with a coefficient of 0.815 and was accepted with sig = 0.000 and 95% confidence level.