A retrospective study on computed tomographic (CT) findings in 35 surgically confirmed cases of common bile duct stones was performed to analyze the characteristic CT findings. Choledocholithiasis was correctly diagnosed by CT in 33 our of 35 cases(sensitivity, 94.3%) and among these CT demonstrated calculi of high attenuation in 32 and of soft tissue density in one case. The thirty two included 23 totally calcified, 5 rim calcified and 4 laminated stones. The target sign was observed in 30 out of 33 CT positive cases (90.1%). We concluded that CT is an accurate modality in the diagnosis of common bile duct stones with its' reliable display of the calcified or the laminated stone itself and its' characteristic target sign.