Autism is a pervasive developmental disorder characterized by impaired social and communication skills as well as restrictive or repetitive patterns of behavior. These impairments significantly influence the manner in which children with autism interact with the environment. Competency level of parents affects their care and management for autistic child. Aim: This study aimed to determine the effect of an educational training on mother's competency level for managing the children with autism. Materials and Method: This study was conducted on fifty mothers and their autistic children at Child Psychiatry out-patient clinic in Psychiatry and Neurology Center in Tanta University. Four tools were used: Biosociodemographic, knowledge and attitude structured interview schedule, Social Communication questionnaire, Parent sense of competency scale, and Mothers' practices structured interview schedule. The data were collected before, immediately after and 3 months after implementation of educational training. Results: The main results revealed significant increase in mother's competency level, decreased emotional stress and increased maternal satisfaction regarding parenting role and care of their autistic children. Conclusion: there was improvement in mother's competency level for managing their children with autism. This study recommended that parents should be actively involved in their children's intervention. Continuous health education programs are necessary to improve parenting approaches and coping strategies.