The present study examined which aspects of the child's behavior and clinical profile accounted for three dimensions of parenting stress: related to parenting roles, to interactions with the child, and to the child. Measures of adaptive behavior, intellectual functioning, autism symptom severity, and challenging behavior and emotional difficulties were examined as predictors of parenting stress in 157 mothers of children recently diagnosed with autism. Children's emotional problems and aggressive behavior were most predictive of parenting distress, whereas autism symptoms along with emotional problems and aggressive behavior, respectively, were linked to stress pertaining to interactions and to the child. These findings underscore the need for comprehensive and complementary interventions that focus on children's behavior and symptoms but also on parent adjustment.