The intravenous phylograms of 126 cases of ureteral stones were analized for study on changes in size, renocortical index (RCI) and function of the affected kidney. The following results were obtained. 1. The size of affected kidney was increased in 45% of cases and decreased in 40% of cases. 2. The affected kidney showed an elevated RCI value as compared to the normal side. The mean value of RCI of the affected kidneys was 0.44 and normal kidneys was 0.35. 3. The cases of upper ureteral stones most frequently showed urinary stasis. The incidence of urinary stasis : hydronephrosis 61% hydroureter 48%, nonvisualization 10%, and combined hydronephrosis and hydroureter in 54% of the all cases.