Objectives: Despite advances in the surgical treatment of parotid duct stenosis, it remains a surgical challenge. This study aimed to analyze the surgical outcomes of sialendoscopy combined with transoral sialodochoplasty for the treatment of patients with parotid duct stenosis with megaduct in parotid glands. Design: Retrospective cohort study Setting: Academic tertiary medical center Participants: This study included 13 patients with chronic obstructive sialadenitis caused by type 2 parotid duct stenosis who underwent sialendoscopy with transoral sialodochoplasty. Main Outcomes and Measures: All patients completed a three-point Likert-type rating scale 3 months postoperatively. Radiologic evaluation using magnetic resonance (MR) sialography was performed to evaluate megaduct diameter. Thirteen glands underwent sialendoscopy combined with transoral sialodochoplasty. Results: At 3 months after surgery, six (46.2%) glands showed complete resolution, and seven (53.8%) showed partial resolution of obstructive symptoms. Megaduct diameter between pre- and postoperative MR sialography significantly decreased after transoral sialodochoplasty (8.05 ± 2.675 vs. 4.15 ± 2.400, P = 0.028). Saliva excretion was improved after the transoral sialodochoplasty, as the distal ducts were visualized with sialagogues postoperatively. Conclusions: Type 2 parotid duct stenosis can be successfully treated with sialendoscopy combined with sialodochoplasty. In cases of large megaduct, transoral sialodochoplasty appears to offer benefits of reducing the diameter of dilated megaducts and improving salivary outflow.