Clinical observation suggests that there might be an important overlap between Borderline personality disorder (BPD) and Autism spectrum disorders (ASS). Given this background it was the aim of this study to investigate autistic traits in patients with borderline personality disorder with special attention on cognitive empathy and alexithymia. 38 women with Borderline personality disorder participated. Autistic traits were assessed with the Autism Spectrum Quotient (AQ), facets of empathy with the Interpersonal Reactivity Index (IRI) und alexithymia with the Toronto Alexithymia Scale (TAS). The results show that almost half of the BPD patients scored beyond the ASS cut-off of the AQ. The subgroup with high autistic traits had lower scores for cognitive empathy and higher alexithymia scores. Implications for clinicians are discussed.