Purpose : To evaluate the incidence, degree, and clinical significance of non-obstructive intrahepatic bileduct dilatation encountered on follow up CT after gastrectomy for gastric carcinoma. Materials and Methods : Weretrospectively analyzed follow-up abdominal CT of 65 patients who had undergone gastrectomy with truncal vagotomyand subtotal gastrectomy for gastric carcinoma. We classified those patients who showed intrahepatic ductdilatation into non-obstructive or obstructive groups depending on the presence or absence of the lesionsobstructing the duct. We also evaluated the incidence, degree and pattern, and appearance time of non-obstructivetype of duct dilatation. Results : Non-obstructive and obstructive biliary dilatation were present in 8cases(12.3%) and 9 cases(13.8%), respectively. The degree of non-obstructive group was mild in 6 cases(75%) andmoderate in 2 cases(25%) who had taken cholecystectomy during the follow up period, and patterns were proportionaldilatation of the central and peripheral intrahepatic ducts. It appeared on follow up CT obtained 6 to 12 monthsafter operation in 7 cases and 3.5months in one case. No statistical significance was noted between the type ofsurgery and the incidence of non-obstructive dilatation(p>0.05). Conclusion : Mild dilatation of the centralintrahepatic ducts without evidence of mechanical biliary obstruction can be seen on follow-up CT obtained morethan 6 months after gastrectomy for gastric carcinoma, and the incidence is about 12%. We think that this findingis non-obstructive and clinical evaluation is unnecessary.