This study examined cultural differences in the relationships between self-ambivalence and posttraumatic stress disorder (PTSD) among Asian British and Caucasian British trauma survivors. Caucasian British trauma survivors with (n = 15) and without (n = 33) PTSD and Asian British trauma survivors with (n = 19) and without (n = 27) PTSD completed questionnaires measuring participants? spontaneous self-descriptions and measures of psychological adjustment. The study showed that self-ambivalence differentiated between Caucasian British trauma survivors with and without PTSD but did not differentiate between Asian British trauma survivors with and without PTSD. Findings demonstrate culture-specific influences of self-ambivalence on PTSD.