Aneurysmal bone cysts in the maxilla and mandible are extremely rare. We reported a case of aneurysmal bone cyst in the mandible treated successfully with an embolization. The patient was a 16-year-old woman. The chief complaint was swelling in the right buccal region. Preoperative at the first surgery with biopsy, the thinned cortical bone and bleeding from the bone marrow were observed. Bone resorption was observed, but tumorous tissue could not be seen. The inner layer of the bone was curetted. Based on the biopsy and the clinical findings, this lesion was diagnosed as aneurysmal bone cyst. During follow-up arterial embolization and sclerotherapy were added. The buccal swelling was diminished, and no evidence of recurrence was observed.