Bronchial leiomyoma is the rarest type of benign pulmonary neoplasm, comprising <2% of benign tumors of the lower respiratory tract. We report the case of a 50-year-old woman with an unremarkable medical history who presented at the emergency department due to right chest wall pain after trauma from a traffic accident. In addition to fracture of the right 5^(th) to 7^(th) ribs, chest radiograph revealed a collapsed left upper lobe. A tumor obstructing the left upper lobe bronchus, causing lobar atelectasis, was seen on chest computed tomography. Fiber-optic bronchoscopic biopsy of the tumor revealed benign leiomyoma. The patient recovered uneventfully after tumor resection via rigid bronchoscopy. This case highlights the possibility of complete tumor resection via rigid bronchoscopy to preserve the distal lung after thorough evaluation and confirmation of the exclusively endoluminal and benign nature of the tumor.