Background: Adherence to self-care behaviors improves outcomes of patients with heart failure (HF). Caregivers play an important role in contributing to self-care. Objective: We aimed to explore the relationships among HF knowledge, perceived control, social support, and family caregiver contribution to self-care of HF, based on the Information-Motivation-Behavioral Skills Model. Methods: Two hundred forty-seven dyads of eligible patients with HF and family caregivers were recruited from a general hospital in China.