Deficit in face recognition is one of remarkable characteristic of individuals with autism spectrum disorders (ASD). However, individuals with ASD improve skill of face recognition through development, such as gender categorization. Although it has been suggested that individuals with ASD reveal abnormal activation in the fusiform face area (FFA), it is unknown whether adults and children with ASD reveal similar abnormality. Furthermore, little is known about neural response in other category-selective visual region such as the extrastriate body area (EBA) and the parahippocampal place area (PPA) in individuals with ASD. In present study, we conducted fMRI study to examine object-selective neural response in the FFA, the EBA, and the PPA on children and adults with ASD. Children and adults with ASD and age-matched typically-developed participants observed pictures of four object categories (faces, non-face body parts, outdoor scenes and cars) under color detection task. Adults with ASD and children with ASD showed comparable behavioral results to age-matched typically-developed participants. Nevertheless, children with ASD produced reduced face-selective activity in the FFA as compared to typically-developed children. The group difference was not observed in adults with ASD. Unlike the FFA, both adults and children with ASD revealed significant body- and scene-selective activation in the EBA and the PPA similar to age-matched control group. These results suggest that individuals with ASD have delay in functional maturation specifically in the FFA, that is, the FFA might mature in adolescence for individuals with ASD.