The burden perceived by the key relatives of 27 schizophrenics and 19 patients with neurotic disorders, both with at least a minimal degree of personal/social disability and a current exacerbation of symptoms, was assessed by a self-administered questionnaire. Only modest quantitative and qualitative differences between the two samples of key relatives were found. The burden perceived by the relatives of schizophrenics was more closely related to the patients' personal/social disability than that reported by the relatives of neurotic patients. The psychopathological features of schizophrenic patients that were perceived as the most burdensome were "negative" symptoms, whereas the burden reported by the relatives of neurotic patients was predominantly related to obsessive/compulsive and anxiety symptoms.