Interviews were conducted with the co-resident supporters of 79 elderly subjects. Forty of these elderly subjects had been diagnosed as being demented (20 mildly, 12 moderately and eight severely) following psychiatric assessment. The supporters were screened for psychological well-being with the 60-item General Health Questionnaire (GHQ) and the Relatives' Stress Scale (RSS). Supporters of demented relatives showed significantly raised levels of stress on the RSS, but no increase in psychiatric morbidity on the GHQ, when compared with the supporters of non-demented relatives. The implications of these findings are discussed.