Inadvertent airway injury is a rare complication of thyroidectomy that can be life-threatening. Most studies report injuries occurring within the tracheal region. In this report, we present a case of subglottic laryngeal perforation following completion thyroidectomy. Based on our literature review, we believe that this is the first report of such a case. Through a multidisciplinary approach, the patient was treated successfully with surgery. This article aims to emphasise that more proximal airway injuries may occur with thyroidectomy and explore the possible factors and treatment options.