The family-caregiver role is of critical importance to the success of symptom-related self-management of patients with advanced cancer. This study examined the perspectives of patients and family-caregivers regarding the role of the family-caregiver in symptom-related self-management support (SMS). Semi-structured interviews were conducted in patients with advanced cancer experiencing significant symptom burden and their family-caregivers. An inductive content analysis approach was used to analyse data. Eleven patients and ten family caregivers were included.