Parents of children with autism spectrum disorders (ASD) have higher rates of depressive symptoms than parents of typically developing children and parents of children with other developmental disorders. Parental depressive symptoms are strongly associated with problem behaviors in children; however, the mechanisms through which parental depression influences child behavior in families of children with ASD are unclear. The purpose of this study was to examine the relationship between parental depression and child behavior problems among families of children with ASD, more specifically to investigate the mediating variables that may explain the processes through which parental depression and child behavior problems are associated. The sample consisted of 33 parents of children with ASD (ages 2 to 5 years old). Findings suggested that authoritative parenting style significantly mediated the relationship between parental depression and behavior problems. This study highlights the importance of considering parental mental health and its impact on parenting behavior in interventions targeting child behavior problems.