Trauma within psychosis is often undiagnosed or untreated. There is a wide body of literature on the efficacy of cognitive behaviour therapy (CBT) for post-traumatic stress disorder (PTSD), but there has been no report of combining CBT for psychosis and CBT for PTSD in modular form. The authors discuss a combined treatment for two patients with psychosis and a history of trauma. The clinical features, process of therapy, and outcome are all described in relation to cognitive therapy models developed for use in PTSD. The implications for therapy, service development, and training are discussed.