The aim of the study is presenting own experiences in using different diagnostic modalities in evaluating abdominal abscesses. Material comprises a group of nine patients with diagnosed abdominal abscess aged between 22 and 78 years. The plain abdominal radiograms, ultrasound examinations and computed tomography were performed in those patients. The CT examination was performed in 10-mm thick axial sections, before and after administering contrast agent. The perirenal abscesses were found in two patients. In US have showed various, inhomogeneous echogenicity, depending on the stage of the abscess. The contrast CT reveals enhancing septa, thick walls and oval, central area of lower density. The plane radiograms revealed abscesses in three cases. In two of them abscesses were complications of previouscholecystectomy. The large abscesses dislocated intestinal loops. CT was necessary to assess the extent, depth and shape of retroperitoneal fluid collections. Abdominal abscess is life threatening condition requiring quick diagnosis and proper management. The imaging methods are especially important in diagnosis of abscesses. Abscesses may by recognized on plain abdominal radiograms, but US and especially CT are much more sensitive and accurate. CT is imaging modality of choice in revealing abdominal abscess. CT and US are very useful in nonoperative therapies, including US and CT guided drainage.