Aims and Objectives: This study examined the predictors of caregiver burden based on patient and caregiver characteristics in a sample of Spanish caregivers looking after adult patients with chronic disease. The effect of task type and patient–caregiver interaction is also analysed. Background: Specific predictors of caregiver burden have been widely examined in the literature. Few studies, however, jointly analyse a wide range of factors, including the effect of task type and patient–caregiver interaction.