Attitude of mothers towards their children's autism may play a role in mothers' psychological well-being. We investigated the predictive value of how mothers understand autism (as a neurodivergence or a developmental disorder) on their psychological distress. A group of 371 mothers of children on the autism spectrum participated in this study. We found that understanding autism as a neurodivergence was related to lower psychological distress in mothers, even after controlling for the level of autism symptoms. However, when controlling for caregiver burden, their attitude towards autism was no longer significant in explaining their psychological distress. These findings suggest that the way mothers understand autism may be important for their psychological adjustment. However, it also suggests that mothers of children on the autism spectrum may adopt different attitudes towards autism, depending on their child's level of autism symptoms and the caregiver burden.