The purpose of this study was to find out differences that exist in the low-income group of children self-regulation and stress coping behavior, behavior problems according to socio-demographic variables(gender, grade, family types) and to investigated the effect of socio-demographic variables, self-regulation and stress coping behaviors on the behavior problems. The subjects of this study were 299 elementary students from lower grades (second, third graders) to higher grades (fifth, sixth graders) in 20 community child centers in Gwang-ju. A questionnaire was used to collect data from the target children. The data showed frequency, percentage, mean, standard deviation, Cronbach' alpha, t-test, One-Way ANOVA, Pearson's correlation and multiple regression. *(Not sure about this sentence... maybe “The data included results from Cronbach' alpha, t-test, One-Way ANOVA, Pearson's correlation and multiple regression and included the frequency, percentage, mean, and standard deviation of the findings.”) The results suggested that aggressive behavior in children was influenced by passive coping behaviors, self-regulation, father-headed single parent families, gender, aggressive coping behaviors, and social support seeking coping behaviors. Depression and anxiety in children were influenced by passive coping behavior, self-regulation, grandparent-headed families, and grades. In conclusion, passive coping behavior is the most influential variable in depression, anxiety, and aggressive behaviors of children.