Accompanying autistic findings in a child with down syndrome with hearing loss Down Syndrome (DS) is the most common chromosomal abnormality in the general population. Hearing loss is common in children with DS. It has been denoted that the rate of autism spectrum disorder (ASD) finding is quite frequent in individuals with DS. Early detection of autism characteristics is important for appropriate intervention. The presented case is a child with DS who was diagnosed with mild/moderate SNHL at the age of 7 months and recommended a hearing aid, and despite receiving intensive special education and rehabilitation program and appropriate family support, his development was very limited. Since his development was very limited, he was diagnosed with ASD when he has been referred to child psychiatry again. This case report shows the importance of directing the child to other disciplines to elucidate the factor causing limitation in cases where speech and language development is limited despite early diagnosis and intervention. Besides, it reveals the importance of routinely screening these children in terms of ASD, due to the high rate of coexistence of ASD in children with DS. Keywords: Down syndrome, hearing loss, autism spectrum disorder, speech and language development, early diagnosis