Le Fort 1 osteotomy is one of the most versatile techniques in orthognathic surgery employed for the correction of dentofacial deformities and is considered technically safe. Pseudoaneurysms (PAs) which can cause life-threatening hemorrhage are rare after corrective jaw surgery. Here, we describe a clinical case of delayed postoperative epistaxis secondary to an extremely rare PA of the posterior superior alveolar artery followed by Le Fort 1 osteotomy subsequently managed with endovascular selective embolization.