Hemorrhagic cholecystitis(HC) is a rare complication of gallbladder(GB) disease characterized by mucosal andintraluminal hemorrhage of the GB. We report ultrasonographic(US) and computed tomographic(CT) findings of twocases of HC. Hemorrhagic fluid filled in the inflamed GB lumen was initially seen as homogenoeus hyperdense andhyperattenuated lesion on both US and CT, respectively. As resolution of the hematoma and gangrenous change of theGB wall progress, US showed inhomogeneous mixed echogenic lesion in the GB having partially indisinct border, mimicking an invasive mass. At this stage, CT still showed homogeneous hyperdense hematoma and a small amount offluid in the GB, without evidence of contrast enhancement.