Objective. To examine the possible association between satisfaction with nursing support and the risk of caregiver strain in informal carers in four Basic Health Areas in Barcelona from 2001 to 2002. Method. An observational, descriptive, cross-sectional study was performed. Subjects were 65 informal carers of both sexes of individuals aged 65 years or older with chronic or terminal diseases, or dementia. Carer-related variables were: age, gender, family relationship with the patient, degree of burden, risk of abandonment, and satisfaction with nursing support. Patient-related variables were: age, gender, type the disease, and degree of dependency. To evaluate the degree of burden in the informal carer, the Zarit scale was used. Results. The mean age of informal carers was 60 years, and most were women (56; 86%). Informal carers had a mean score of 61.20 points on the Zarit scale (SD = 16.50; 95% confidence interval, 57.11-65.29). There were 42 (65%) informal carers at risk of caregiver strain (65%). No statistically significant differences were found between satisfaction of the informal carer and the risk of caregiver strain. Conclusions. The profile of the informal carer corresponds to women with a high level of satisfaction with nursing support and a high risk of caregiver strain.