Objective: To study the benefits of modified endoscopic Denker's approach for benign sinonasal tumors. Methods: The study includes prospective analysis of six histopathologically diagnosed patients of sinonasal inverted Papilloma with special emphasis on our experience with modified endoscopic Denker procedure. All patients underwent detailed preoperative evaluation with clinical history, nasal endoscopic examination, and contrast-enhanced computed tomography scan to see the origin and extent of disease. All the relevant findings including patient demographic profile, tumor staging, and surgical outcomes including recurrence were studied. Patients with intracranial or intraorbital extension, extensive frontal sinus involvement, or with sinus malignancy were excluded for this endoscopic approach. All patients were called for periodic endoscopic evaluations in the follow-up period. Results: All six patients operated in the study were in stage III of Krouse staging system. All patients underwent endoscopic surgical resection using modified Denker's approach and endoscopic dacryocystorhinostomy were done as an adjunctive surgical procedure. Intraoperative period was uneventful and no complication was encountered in any of the patients. No recurrence was noted in any of them at the end of follow-up of 18 months. Conclusions: Preoperative evaluation including histopathological biopsy and radiological examination if rules out malignancy, surgical resection using modified endoscopic Denker's approach is an excellent option and could be helpful in achieving complete resection of benign sinonasal tumor such as inverted papilloma. Subperiosteal dissection at the site of involved areas and regular endoscopic evaluation in the follow-up period are the keys for success and thus chances of recurrence can be reduced.