Cardiac complications are becoming increasingly important in patients with HIV infection. Right-sided endocarditis are more common in intravenous drug users (IVDU) with HIV infection. Some studies have pointed out that the clinical outcome of such patients depends on the affected valve referred to the responsible agent rather than the HIV serostatus. However, severe immunosupression and low CD4 count are associated with increased risk of death. This report presents a case of isolated tricuspid valve endocarditis with advanced HIV infection who was also an IVDU.