Objectives : The aim of our study was to compare the voice outcomes of trans-oral robotic thyroidectomy (TORT) and trans-cervical thyroidectomy using subjective and objective parameters of voice analysis test.Materials and methods : The study involved 78 female patients who underwent thyroid surgery between November 2020 and April 2023; 39 patients underwent TORT and 39 patients underwent trans-cervical thyroidectomy. We compared both subjective and objective parameters of voice analysis results between the two groups preoperatively, and 1 week, 1 month, and 3 months after surgery.Results : The voice handicap index (VHI)-10 score was recovered in TORT group at 3 months after surgery while not in trans-cervical group. The highest frequency and frequency range was higher and broader in TORT group, respectively, showed significant difference between two groups, and both were recovered only in TORT group by 3 months after surgery.Conclusion : TORT has advantages of recovering vocal pitch and is superior to conventional trans-cervical thyroidectomy in terms of voice outcomes.