An 82-year-old man with hemoptysis was admitted to our hospital. He had a history of bronchiectasis, but this was the first time he had ever developed hemoptysis. He had first gone to a neighboring hospital and received antibiotics intravenously. He was referred to our hospital for further evaluation and management. Despite conservative management, including aggressive antimicrobial treatment, the patient experienced massive hemoptysis on the third day after admission and underwent emergency BAE. Before emergency BAE, he underwent preprocedural evaluation by contrast-enhanced computed tomography (CT) scan with a 128-slice scanner (Siemens SOMATOM Drive, Siemens Healthineers, Tokyo, Japan), with the arterial phase 30 s after, and the delayed phase 90 s after intravenous contrast administration (100 mL Oypalomin 370 mg/mL, Fuji Pharma, Tokyo, Japan) at 3 mL/s. The chest CT lung window imaging showed bilateral bronchiectasis and a large bulla with surrounding consolidation in the right lower lobe, which was thought to be the source of hemoptysis. Furthermore, computed tomography angiography revealed an ectopic BA that arose from the right thyrocervical trunk, supplying the right lower lobe in addition to the normal right BA. This ectopic BA was significantly hypertrophied compared to the normal right BA, suggesting that the ectopic BA was the culprit vessel of the hemoptysis. Superselective embolization of the ectopic BA was performed with gelatin sponge particles and metallic coils (Tornado, Cook Medical, Bloomington, USA) with a 1.9–2.9 Fr microcatheter (Breakthrough, Boston Scientific Japan, Tokyo, Japan). After superselective embolization of the ectopic BA, the normal right BA was selectively embolized with gelatin sponge particles. Hemoptysis was controlled by this procedure without any procedural complications. He was discharged on day 5 of hospitalization with no complications.