Acute appendicitis is the most common cause of acute abdominal pain requiring emergency abdominal surgery. The clinical presentation is most commonly atypical and symptoms overlap with other abdominal conditions making the diagnosis difficult. There are several scoring systems available in the literature developed by several authors for the diagnosis of acute appendicitis. The variables of Lintula scoring system is purely dependent on physical examination so it can be easily used in rural hospitals where imaging techniques and laboratory tests are not available. Prospective observational study conducted at Department of General Surgery in hospitals which included 130 patients who were clinically diagnosed cases of acute appendicitis who underwent emergency open appendicectomy.The sensitivity, specificity, positive predictive value and negative predictive value of lintula score were 93.1%, 44%, 95.7%, 33.3% respectively. The negative appendicectomy rates were 1.3%.The use of Lintula score has improved diagnostic accuracy compared to that of unaided clinical methods and helps in reducing negative appendicectomy rates.