Objective: The purpose of this study was to examine the effects of maternalparenting stress and mother s ego-resilience on mother-child attachment. Morespecially, mother-child attachment for higher grade elementary school children wasexamined according to the internal working model. Methods: Participants were 190 mothers of fourth and fifth grade elementary schoolchildren. The Maternal Parenting Stress Scale(Shin, 1997), the Scales of Egoresilience (Yoo & Shim, 2002), and Inventory of Parent Attachment(Yang, 2006)were used to measure variables. Collected data were analyzed by descriptivestatistics, t-test, correlation analysis and multiple regression analysis. Results: The major findings were summarized as follows: First, there were nodifferences between mother-child attachment according to children’s gender. Second,mother-child attachment was negatively correlated with maternal parenting stressand positively correlated with ego-resilience. Next, maternal parenting stress_interaction and ego-resilience explained mother-child attachment_trust. Last,maternal stress_interaction explained mother-child attachment_isolation. Conclusion/Implications: In conclusion, the study results showed that maternalparenting stress and ego-resilience influenced mother-child attachment. based onthe results, the implications of this study were discussed.