The present work extra hepatic biliary apparatus was done in the department of surgery, P.M.C.H., Patna. This work was done to find out the incidence of congenital anomalies of gall bladder, relative incidence of aberrant bile duct or cystic duct, anatomical variation of hepatic artery and cystic artery and pattern of junction of cystic duct with the common hepatic duct to form the common bile duct. In this work study was also included the case admitted and operated in operation theatre. It was observed that the capacity of gall bladder varying from 21 – 141 ml with an average of 50 ml. Incidence of different congenital anomalies of gall bladder were observed and was found one case of floating gall bladder and two cases of left sided gall bladder. No cases of double gall bladder, diverticulum of gall bladder, congenital absence of gall bladder, intra hepatic gall bladder, hour glass gall bladder, bilobed gall bladder were observed in present work. The dimension of cystic duct was variable. The average length of cystic duct was 3.0 cm in males and 2.8 cm in females. It was also observed that that the cystic duct joined on the right side of common hepatic duct in 83% of cases. 12 cases of accessory bile duct were observed. It was also observed that the aberrant bile ducts were drained into common hepatic duct in 3 cases, aberrant cystic duct draining into right hepatic duct in one case and into left hepatic duct in one case. The right hepatic artery arising from the common hepatic artery in 76% of cases, whereas 2 cases of accessory right hepatic and 1 case of replacing right hepatic artery was observed.