Background: Family caregivers of patients with poor prognosis upper gastrointestinal (GI) cancers are at high risk of experiencing psychological distress and carer burden. The early postoperative period is a time of high patient care needs and transition of care, with carers new to the caring role. This study aimed to explore the experiences of family caregivers of people diagnosed with upper GI cancer after surgical intervention to (1) identify their unmet supportive care needs and (2) investigate how family caregivers perceive their role during this time.