a multifactorial etiology involving the nose, palate, tonsils, and pharyngeal morphology (2,3). One of the most common causes of mouth breathing, upper airway obstruction, and related sleep apnea is the nasal septal deviation. The most common reason for admission to otolaryngology outpatient clinics due to nasal obstruction is nasal septal deviation. It ranks first among nasal surgeries performed due to nasal congestion. This nasal resistance Sarı et al. Relationship Nasal Septal Deviation and Oropharynx