Introduction: Most potential severe complication of laparoscopic cholecystectomy (LC) is bleeding and bile duct injury, which can predisposed by aberrant right posterior sectoral hepatic duct (aPHD). The aim of this study was to clarify the correlation between types of aPHD and preoperative cholangiogram using magnetic resonance cholangiopancreaticography (MRCP), endoscopic retrograde cholangiopancreaticography (ERCP) and tube cholangiogram via percutaneous cholecystostomy prior to laparoscopic cholecystectomy. Method: Between March 2017 and February 2019, 614 patients who underwent LC were evaluated preoperatively using cholangiogram in our institution. Retrospectively, with Hisatsugu classification, aPHD was categorized into 5 types as followed: type I (cystic duct joined with aPHD), type II (both aPHD and cystic duct at the same position of common bile duct), type III (aPHD joins common hepatic duct), type IV (aPHD joins common bile duct at a duodenal side of common bile duct), and type V (aPHD joins cystic duct). Result: aPHD was found in 32 of the 614 patients (5.21%). According to Hisatsugu classification, we classified patient group into type I (0.65%), type II (0.49%), type III (3.90%), type IV (0%), and type V (0.16%), respectively. Also we found another similar anatomic variation in 4 patients (0.65%). Bile duct injury did not occur in these patients. Conclusion: It is important to preventing bile duct during LC with preoperative detection of bile duct anomaly. This study demonstrates that preoperative evaluation using MRCP, ERCP, tube cholangiogram is useful in detection of aPHD and other intrahepatic biliary abnormaly before performing LC. Also, injury of bile duct can be avoided by exposing detailed anatomy during surgery with critical view of safety using appropriate procedure.