Background and Aim: Children with autism have cognitive dissonances and emotional problems, such as depression, anxiety, learning problems, and mental development problems caused by sleeping DISORDERs. The object of the present review article was to study sleep DISORDERs and their related factors.Material and Methods: The current review article was written to discuss sleep in children with autism according to the latest clinical research. Articles published between 2000 and 2015 were reviewed. We searched for three keywords (sleep, autism, and functional) using Google, ProQuest, PubMed, Science direct, and Google Scholar. Initially, 55 investigations were found meeting the specified criteria. Articles related to sleep DISORDERs, sleep, functional autism, and sleep were selected using a targeted selection approach. During this process, seven articles were selected as the main articles for the review.Results: It was found that sleep in children suffering from autism might be influenced by mental damage, anxiety, and behavioral problems. On the other hand, appropriate physical activity may improve sleep patterns and sleep DISORDERs. Understanding sleep, factors affecting sleep, sleep problems, and their treatments may greatly help in improving sleeping in children with autism.