25 young autistic children were examined in Ainsworth’s Strange Situation. The attachment security of 21 children could be classified. Almost half(44%) of these children were securely attached. The relationship between attachment security and developmental variables(chronological age, social quotient, severity of symptom) was investigated. There were no significant differences on CA, social quotient, and severity of symptom between secure attachment group and insecure attachment group. Although autistic children have social deficits, they develop secure attachment to their mothers.