Cavernous hemangioma of the adrenal gland is a rare, non-functioning benign neoplasm. It is mostly a unilateral lesion and appears commonly at the age of 50 and 70 years. Most of the patients are asymptomatic and detected as incidentaloma. A 60-year-old man was incidentally found to have a right adrenal lesion during contrast-enhanced computed tomography (CECT) examination for chronic abdominal pain. The right adrenal lesion from the CECT abdomen measured 7 cm in diameter with features of adrenal carcinoma. Open right adrenalectomy was performed with the findings of 8 cm well-circumscribed right adrenal lesion with minimal adhesion to the inferior surface of the liver. The surgery was uneventful and the patient recovered well completely. The final histopathological examination confirmed a benign cavernous hemangioma. Adrenal cavernous hemangioma, which is a rare benign vascular malformation, might be difficult to be distinguished preoperatively from adrenal carcinoma because of the large size and similar features from computed tomography (CT) scan. Surgical excision is recommended due to the risk of spontaneous tumor rupture and the difficulty of ruling out malignancy.