Suzuki et al. (2014) was pointed out that high-functioning autism in task of understanding of the causal relationship between act and result showed a characteristic that is different from the typically developing children. This study was investigated to conduct causal relationship task to school age before the typically developing children about pointing out the Suzuki et al. (2014). As a result, the characteristics of high-functioning autism was not confirmed in the typically developing children in infancy. Thus, high-functioning autism who was suggested to exhibit difficulties in understanding the causal relationship.