The anatomical variants of the posterior right sectoral duct of the biliary tract are frequent. They have a surgical importance involvement. We report a case of 63-year-old female patient operated by laparoscopy for acute cholecystitis with an intraoperative cholangiography discovery of an insertion of the posterior right sectoral duct on the bile duct below the cystic duct. The insertion of the posterior segmental canal on the bile duct could represent type A6 of the Huang classification. This biliary variation should be known to avoid posterior segmental canal injury, during cholecystectomy.