Achalasia is a rare esophageal motility disorder, with unknown etiology. It is characterized by an esophageal aperistalsis, and a failure of relaxation of the lower esophageal sphincter in response to swallowing. The clinic, the barium swallow and endoscopy suggest the diagnosis; that is confirmed by manometry. Surgical treatment, palliative, provides excellent results in terms of dysphagia but increases gastroesophageal reflux risk. The combination of Heller myotomy and a fundoplication is used to prevent postoperative gastroesophageal reflux, but the results remain controversial. Our study aims to compare the postoperative results in terms of gastroesophageal reflux in both groups of patients who underwent the Heller myotomy with and without fundoplication, in order to challenge the interest of the systematic association of the fundoplication. Among the 34 patients in the study, 7 have benefited of the Heller myotomy with fundoplication, and 27 have benefited from the Heller myotomy without fundoplication. Our results showed that clinical gastroesophageal reflux occurred for 14% of patients with fundoplication and 18,5% of patients without fundoplication. On the other hand, the pH reflux occurred for 80% of patients with fundoplication and 69.2% of patients without fundoplication. The pH measurement analysis after the surgery showed an average GERD rate in a standing position of 1.9% in the group of patients with fundoplication and 7.2% in the group of patients without fundoplication. The same analysis showed an average rate of gastroesophageal reflux in a lying position of 30% for both groups. We concluded that there is no difference between using the fundoplication or not to prevent postoperative GERD, so it should be dedicated to specific cases such as hiatal hernia.