The objective of this research is to understand the relationship between the social support and the parenting self-efficacy on child’s parent with autism spectrum disorder in Blitar City. This research is a quantitative research with correlational descriptive research design. The sample of this research were 35 parents of children with autism spectrum disorder in Blitar City. The result of this research are: (1) 68,6% child’s parent with autism spectrum disorder in Blitar City have the parenting self-efficacy in the medium category; (2) 82,9% child’s parent with autism spectrum disorder in Blitar City have social support in the high category; (3) there is a positive relationship between social support and parenting self-efficacy on child’s parent with autism spectrum disorder in Blitar City.