Background: Obstructive sleep apnea is defined as “five or more respiratory events (apneas, hypopneas) in combination with severe daytime somnolence, waking with gasping, choking, or breath-holding." Objective: to investigate the importance of anterolateral pharyngoplasty in the management of obstructive sleep apnea by increasing pharyngeal airspace and decreasing palatal and lateral pharyngeal wall collapse. Methodology: A prospective interventional study included 30 patients over the age of 18 who were suffering from symptoms suggestive of obstructive sleep apnea; each patient was assessed by history, polysomnography, and a cahali VI lateral pharyngoplasty, with the patients being followed-up for six months after the procedure. Results: There was statistically significant reduction of sleeping index postoperatively compared to preoperatively (51.27 ± 5.71 vs. 37.53 ± 2.64). There was statistically significant reduction of apnea hypopnea index postoperatively compared to preoperatively (27.77 ±  9.55  vs. 21.33 ± 8.07 ). There was statistically significant reduction of Epworth sleepiness scale postoperatively compared to preoperatively (2.40 ± 0.72  vs. 0.83 ± 0.70 ). Conclusion: Cahali VI lateral pharyngoplasty can be used as a stand-alone treatment for all OSA patients.