Certain parenting behaviors have been linked with youth aggression and violence, but less is known about whether parents' attitudes toward fighting are a risk factor for children's aggressive behavior problems and future injury risk. Social cognitive theory suggests that parents' beliefs about fighting and retaliation may influence their children's attitudes toward fighting and aggression. The authors examined the associations among parental and youth attitudes toward fighting, parent-child relationships, and youth aggressive behavior in adolescents at great risk for future interpersonal violence. Data came from 72 parents and their adolescents (aged 12 to 17 years, 89 percent African-American), who presented to an emergency department for youth's assault-related injuries. Analyses revealed an association between parents' and youth's attitudes toward fighting. Youth's and parents' attitudes were positively correlated with aggressive behavior, fighting, and school suspension. Parents' attitudes predicted youth's aggressive behavior, even after controlling for youth's attitudes. The findings suggest that interventions for high-risk youth should target the fighting-related attitudes of both parents and youth. (Published Abstract)