목적: To analyze the voice outcomes in patients who underwent transoral laser microsurgery (TLM) for T1 glottic carcinoma. 방법:A retrospective review of 57 patients who underwent TLM for T1 glottic carcinoma as an initial treatment and underwent voice analysis before surgery, 3 months and more than 6 months after the surgery. The patients were examined for perceptual and acoustic voice analysis, maximal phonation time (MPT) and Voice Handicap Index (VHI). 결과:The patients included 51 T1a cases (89.5%) and 6 T1b cases (10.5%) and were treated with TLM as a single modality treatment. The MPT, maximal energy,VHI, Asthenicity and Strain of GRABS scale showed significant deterioration of voice quality 3 months after surgery. However, the parameters showed no significant deterioration 6 months after the surgery, while Grade and Roughness scale showed significant improvement. Improvement of voice quality was not identified in patients with tumor involvement of anterior commissure or bilateral vocal cord. Grade scale showed significant correlation to all other parameters related to voice quality in this study. 결론:Voice quality of patients following TLM for T1 glottic carcinoma showed no significant deterioration, and may be improved in cases with unilateral tumor without involvement of the anterior commissure.