This study investigated whether the work-family interface (WFI) affects children's mental health difficulties through parental family role performance and psychopathology, using a sample of 444 biological parents of children aged 4-17. SEM-based path analyses suggest that parents' psychological strain and family role performance are total mediators linking the work-family interface with children's mental health difficulties. The findings support the design of organizational and family interventions focused on balancing work and home roles, whose benefits can be transmitted from working parents to their children through improvements in the family environment.