In this study, the author investigated narrative performances of 10 high-functioning young adults with Autism Spectrum Disorders (ASD) across personal and storybook narratives. Narratives were elicited with genre-specific procedures and then transcribed and scored using the narrative scoring scheme (NSS). One-tailed paired-sample t tests were conducted on four variables, for which the standard mean difference between the genres (NSS Total Score, Introduction, Conclusion, and Mental States) was large. To avoid inflating Type I error, an alpha of 0.012 was set. Results indicated that, on average, high-functioning adults with ASD had poorer quality personal narratives for NSS Total Score, Mental States, and Conclusion. This suggests that many high-functioning adults with ASD have difficulty in expressing how they feel and often neglect to conclude and make sense of their experiences in a social context. Telling personal narratives is an important skill for high-functioning adults with ASD because narratives support social interaction and relationships.