Extretory urographic findings of renal tuberculosis are quite well known but sonographic findings of renal tuberculosis have rarely been decribed in the previous literature. This study was undertaken in order to evaluate or compare the advantages and disadvantages of the excretory urogram and the sonogram in renal tuberculosis. we retrospectively compared the information obtained by the excretory urogram and the sonogram performed on 24 bacteriologically proven renal tuberculosis patients. The information obtained by both the excretory urogram and the sonogram were similar in 16 cases out of 24 cases. The sonogram was better in six cases: Three cases in which the kidney was non-visualized on the excretory urogram showed multifocal calyectasis(n=2) and diffuse hydronephrosis(n=1); Two cses with features of parenchymal destruction on the excretory urography showed on the sonogram; One case which showed a phantom calyx on the excretory urogram showed multifocal calyectasis. The extretory urogram was better in four cases: When examined by excretory urogram these 4 cases with normal sonograms, showed papillary necrosis in three of the cases and multifocal calyectasis in one case. Overall detection rate of renal tuberculosis was slightly higher in the excretory urogram than in the sonogram. In advanced stage, the sonogram was better than the excretory urogram in the evaluation of the degree fo parenchyma destruction, and complications such as pyonephrosis.