The capacity to imagine oneself experiencing future events has important implications for effective daily living but investigation of this ability in autism spectrum disorder (ASD) is limited. This study investigated future thinking in 30 children with high functioning ASD (IQ > 85) and 30 typically developing children. They completed the Adapted Autobiographical Interview, a measure which required participants to describe personal past events (indexing episodic memory) and plausible future events (indexing episodic future thinking). The results showed that there are ASD-related deficits in future thinking, and also provided preliminary evidence regarding cognitive mechanisms that may (and may not) contribute to these difficulties. The theoretical and practical implications of these results are discussed.