BACKGROUND: Cavernous sinus hemangiomas (CSHs) are rare vascular tumors. Stereotactic radiosurgery is an effective treatment for small CSHs. The optimal treatment for giant CSHs is controversial. This study reports advantages of a complete intradural transcavernous approach in total resection of CSHs. METHODS: Between January 2012 and January 2017, 15 patients with giant CSHs were treated surgically. All cases were evaluated with a contrast-enhanced magnetic resonance imaging scan and confirmed histopathologically. A complete intradural approach was used for all patients. Clinical manifestations, radiographic characteristics, operative techniques, and outcomes of patients were analyzed. RESULTS: Headache was the most common initial symptom, followed by decreased visual acuity and diplopia. Postoperative magnetic resonance imaging showed that gross total resection was achieved in 13 patients. Two patients had experienced total ipsilateral visual loss for several years before surgery; vision improved in all remaining patients with preoperative visual diminution. The most common early neurologic deficit was cranial nerve VI dysfunction, which was observed in 9 patients (60%; 5 new deficits). Only 2 patients (13.3%) experienced permanent morbidity on long-term follow-up. The early postoperative morbidity rate for cranial nerve III dysfunction was 33.3% (5 patients), and only 1 patient (6.7%) experienced permanent morbidity. Four patients (26.7%) had slight postoperative facial numbness. CONCLUSIONS: Surgical total resection is the primary and reasonable choice for giant CSHs. Microsurgical resection of giant CSHs through a completely intradural transcavernous approach is an alternative treatment option for giant CSHs.