Objective: A model of family risk factors and harsh discipline practices that predict child’s aggressive behavior was empirically evaluated, identifying its adequacy in terms of data adjustment and conceptual congruence. Method: A sample of 409 mothers of children from public elementary schools was used. The selected family risk factors were: symptoms of maternal anxiety, marital violence and harsh discipline practices; the criterion variable was the child’s aggressive behavior. The model assumes that maternal anxiety and marital violence have effects on child’s aggressive behavior, which is mediated by harsh discipline practices. The research strategy was designed with a structural equation model. The results were satisfactory (CFI = .952, NNFI = .94 and RMSEA = .08) and the model predicted 34% of the variance of child’s aggressive behavior problems. Due to its direct effects, h...