The purpose of this research was to increase the shelf life of mango by using gamma radiation Co 60 source retaining the nutritional composition of mango. Sindhri variety of mango was collected from wholesale market of Lahore to check the effect of gamma radiations on mango. Mangoes were radiated at PARAS Lahore. The doses used for gamma radiation were 0.5 kGy, 1kGy and 1.5 kGy to check the moisture, fat, carbohydrates, protein, ash and fiber contents of mango. Results showed positive effect on export rate of mangoes of Pakistan and minimum loss of nutritional values. It is concluded that optimized dose for mango is 0.5 kGy.