Objective - to determine the role of ultrasound in the diagnosis of cholangiocarcinoma. Material and methods. Ultrasound examination conducted in 120 cholangiocarcinoma patients. The results were confirmed by data from other research methods, biopsy, surgical palpation and histopathological examination of the resected material. Results. The most difficult is to diagnose tumors of the distal portions of common bile duct. Sensitivity of ultrasound, X-ray CT, MRI, surgical evaluation in the diagnosis of cholangiocarcinoma was: in intrahepatic type - 100%, 100%, 100%, 100%; hilus type - 69%, 75%, 86%, 92%; distal type - 37%, 42%, 69%, 80%. Ultrasound found no evidence of intrahepatic CCA semiotic signs that would distinguish it from other liver cancers. The features of infiltrative tumor growth bile ducts - hyperechoic structure infiltration along the outer contour of the ducts, or hypoechoic structure infiltration at the thickening of the walls of the ducts. The ultrasonic semiotics of modified metastatic lymph nodes has been developed. Conclusion. Ultrasound showed highly informative diagnostic ultrasound in determining the expansion of the bile ducts; the tumor has spread to the liver and lymph nodes. Recommended to extend indications for intraoperative ultrasonography with extrahepatic cholangiocarcinoma to delineate tumor lesions ducts.