Aim: To describe family members' experiences of attending to an old person with diabetes receiving home care services, including their interaction with the formal caregivers. Methods and Results: The study has a qualitative descriptive design. From May to August 2015, eight family members were interviewed. Interviews were analysed using qualitative content analysis. To describe family members' experiences, the following four themes were identified: Security through patients' self‐management skills and diabetes knowledge; Perceived burden due to the old persons' deteriorated health; Security through competent home care services; and Doubt due to personnel's inadequate approach and interaction. Conclusion: It is important for personnel in home care services to consider patients' self‐management skills and the family members' diabetes knowledge as key aspects in order to limit experiences of burden when the older person with diabetes has deteriorating health. The findings underscore that interaction with home care personnel skilled in managing diabetes helps family members feel secure.