Intravenous pyelograms of 106 cases of urolithiasis were analyzed and concluded that: 1. The incidence ishighest in age of 21 to 40 year and male to female ratio is 1.8:1. 2. The predilection site is the lower onethirds of the ureter. 3. Advanced hydronephrosis is combined in 24 per cent of cases, respectively. 4. On scoutfilm, the radiopaque stone account for 96 percent of all stones, respectively