The sona masuri rice (Oryza sativa L.) is extensively grown food crop in southern india. The rice is good source of carbohydrate and protein. In the present study, the two samples broken raw rice (Sample A) and broken steamed rice (Sample B) were taken and firstly subjected to proximate analysis inclusive of moisture content, protein content, fat content, ash, crude fibre and carbohydrate content.the moisture content of sample A was 12.33% where as that of sample B was 11.87%. the protein content of sample A was 10.5% and sample B was 9.76%. the carbohydrate content of sample A was 75.61% and sample B was 76.98%. The starch was extracted from broken raw rice and broken steamed rice by alkali treatment. The starch was isolated by using 2%, 3% and 4% of sodium hydroxide solution for 24 and 48 hr. the highest amount of starch was obtained from broken steamed rice i.e. 50.63g. the obtained starch was then subjected to proximate analysis for purity determination.