Nowadays, ultrasound examination is routinely utilized in the diagnosis of acute cholecystitis and its complications. Perforation of the gallbladder wall is usually suspected from indirect, non-specific sonographic findings, i.e. pericholecystic fluid collections, free peritoneal fluid, irregular gallbladder wall thickening, gallbladder distention, gallstones, coarse intracholecystic echogenic debris, and a complex mass in the gallbladder fossa (Forsberg et al, 1988; Chen et al, 1990). Sonographic visualization of the gallbladder perforation itself is rarely achieved (Chau et al, 1988; Takada et al, 1989; Chen et al, 1990). We report a case in which colour Doppler sonography allowed direct visualization of the biliary leakage across the gallbladder wall, thus providing the diagnosis. In addition, percutaneous catheter drainage of both the gallbladder and adjacent collection allowed the perforation to heal, hence avoiding surgery.