The objective of this study was to report an unusual case of unilateral adrenal hematoma in; a 19-year-old young man who did not have a history of any specific systemic disease. The patient was admitted to hospital with chest pain that lasted for one day. Preoperative contrast-enhanced computerized tomography evaluated an adrenal mass (sized, 10.5 x 12.7 cm) adjacent to the anterior of the left kidney, and findings were indicative of adrenal hematoma. The final pathological diagnosis was adrenal adenoma.