Background: Compared to previous generations Xi system, the SP robotic system offers a greater range of motion and more precise surgical control. The aim of this study was to introduce our robotic technique, which can minimize the dissection extent using the da Vinci SP robotic system via only hairline incision. Methods: Forty patients underwent robotic thyroidectomy using the da Vinci SP robotic system via only hairline incision between February 2020 and April 2021 at Ulsan University Hospital. All procedures were performed successfully using the SP robotic system without any significant intraoperative complications or conversion to open surgery under EMG monitoring by one surgeon. After using SP system, usually only hairline incision was performed without extension to retroauricular area. Results: All patients were women and diagnosed with 32 papillary thyroid carcinomas and 8 follicular adenomas. Hemithyroidectomy was performed in 32 patients and total thyroidectomy in 8 patients. Central neck dissection was performed in 32 patients. The mean operative time was 140.2±50.7 minutes and mean console time 74.0±42.7 minutes in all patients. Additionally, the mean operative time of hemithyroidectomy and total thyroidectomy was 119.2± 31.4 vs 213.01 ± 63.1 minutes (console time: 61.3±20.9 vs 138.8±38.4), respectively. All patients were discharged on the two or third day after operation without any complications. Conclusions: Robotic thyroidectomy using the da Vinci SP robotic system via only hairline incision is technically feasible and safe with a short length of incision. To our knowledge, this is the first study to use a single-port robotic system for thyroidectomy using hairline incision. To verify the superior operative outcomes, further clinical trials are necessary.