Background : Surgery of the nasal septum and turbinates are among the most frequently performed procedures in otolaryngology. They are performed in varying techniques for decades. Aim of the work: The aim of this study is to investigate the effect of nasal obstruction surgery (nasal septum combined with inferior turbinates) on middle ear function. Patients and Methods: This study is a prospective case series study carried out at the E.N.T outpatient clinic of Zagazig University Hospitals during the period from October 2018 to April 2019. Patients were recruited from the Otorhinolaryngology Departments, Faculty of Medicine, Zagazig University Hospitals. Results: There was statistically significant difference between the pre and post-operative tympanometry type and Eustachian tube function with improvement of Eustachian tube function and there was highly statistically significant difference between the pre and post-operative mean ear pressure in both ears and there was highly statistically significant difference between the pre and post-operative mean ear pressure in both ears in successive times. Conclusion: Nasal obstruction surgeries significantly improved ETF and middle ear pressure. The complete evaluation of nasal air flow is mandatory before middle ear surgery in order to assess the hypoventilation of the middle ear.