Thymic carcinoma is a rare anterior mediastinum tumor. Although pleural metastasis is common, thymic carcinoma presenting as spontaneous hemothorax is a rare presentation. We present the case of a 53-year-old man without a past medical history who was admitted from the emergency department for a sudden onset of left chest pain with cold sweating, followed by increasing shortness of breath. A chest roentgenogram taken on admission showed a large amount of pleural effusion on the left side. A diagnostic thoracocentesis yielded bloody pleural fluid, which was consistent with hemothorax in biochemical and cytological studies. Diagnostic video-assisted thoracoscopy showed a left chest wall tumor with bleeding. Limited thoracotomy with resection of the tumor was performed. The histologic report revealed metastatic thymic carcinoma. We also reviewed the literature on thymic carcinoma.