Objective: To report the use of a 3 mm rigid nasal endoscope in primary endoscopic stapedotomy and clinical and audiological outcomes.Materials and methods: Thirty patients diagnosed with primary otosclerosis underwent endoscopic stapedotomy that was performed using a 3 mm nasal endoscope (Karl Storz). At 6 months follow-up, the patients were evaluated for intraoperative findings, postoperative hearing outcomes and complications. Results: Canaloplasty was performed in 2 (6.66％) patients, and no curettage of the canal wall was required in 12 (40％) patients. Transposition of the chorda tympani nerve was conducted in 11 (36.66％) patients. The average duration of surgery was 36 min (range 31-65 min). The air-bone gap (ABG) was 35 dB (range 24-50 dB) preoperatively and 14.63 dB (range 9-20 dB) postoperatively (p = 0.00). At 6 months follow-up, <20 dB ABG was achieved in 93.33％ of the patients. No major intraoperative/post-operative complications were detected. Conclusion: A 3 mm rigid nasal endoscope can be effectively used in stapedotomy to obtain adequate audiological outcomes. It can be considered as a better alternative to the standard microscope or 4 mm endoscope in preserving the posterior canal wall and chorda tympani nerve while minimizing operative time without causing significant complications.