The aim of this study was to evaluate the size of the common bile duct (CBD) in patients with gallstones, before and after cholecystectomy. Ten female patients (22-61 years) were examined in whom gallstones were shown by ultrasound. The caliber of CBD was measured before cholecystectomy and then 6, 12, 18, and 24 months after cholecystectomy. No significant change of CBD caliber in each interval prior to or following cholecystectomy was observed.