Background: Acute abdomen is the common cause of emergency admissions. USG plays an important role in the diagnosis of disease. Material and methods: This study was done on patient presented with acute abdomen in Department of Radiodiagnosis, SP Medical College &Associate Group of PBM Hospitals, Bikaner. Scout X-ray done in 250 patients. Scout X –Ray film gives lots of information and very helpful in diagnosing perforation and intesinal obstruction. Results: X-Ray was 100% diagnostic in cases of perforation peritonitis. Intestinal obstruction was diagnosed in 95.55% cases. Conclusion: This study shows that simple X-Ray plays an important role in definite diagnosis of acute abdomen.