Background: Caring for people with advanced illness has an impact on caregivers' physical, psychological, and emotional health. Patients being evaluated for lung transplantation or those on the transplant waitlist are required to have identified social support. However, little is known about the caregivers' specific supportive care needs. Objective: The aim of this study was to determine the supportive care needs of informal caregivers of patients who are being evaluated for or awaiting lung transplantation.