Abstract Background: Autism spectrum disorder (ASD) is a neu-rodevelopment disorder that emerges in early childhood, characterized by a range of deficits in two specific domains: The first one is social communication and social interaction; and the second one is repetitive patterns of behavior. Many features are representing Children with autism such as they have lack of social and emotional engagement, don't make eye contact, restricted routines, insistence on sameness and inflexibility. Feeding problems involved in children with au-tism are chewing problems, feeding behavior problems and selectivity that are obvious in them than their typically devel-oping peers. This problems must be encountered, addressed and highlighted through appropriate assessment because this problems affect both the children with autism and their par-ents. So that powerful assessment must be accomplished to help physiotherapists and heath care providers make the most appropriate intervention. Aim of Study: To examine the relation between chewing function and feeding behaviors in children with autism and compare them with their typically peers. Conclusion: Children with autismhad chewing problemsin the form of prolongation of chewing time. On other hand, feed-ing behaviors problems showed disruptive refusal behavior and selectivity problem. We concluded that this help the physiother-apist and heath care providers to make appropriate intervention