The leaves of Ocimum sanctum were analysed for its proximate and mineral composition. Fresh leaves of tulsi were collected from Sonamukhi region (23°18'27.27"N and 87°24'56.86"E) of Bankura district in West Bengal from different patches. The proximate and mineral composition of the leaves of O. sanctum was analyzed using standard methods of food analysis. The results show high carbohydrate content in the leaves with considerable protein content and low percentage of fat. Mineral composition indicated that the leaves of the species are good sources of K, Ca and Mg. High K content in the leaves suggest the plant to be highly beneficial for patients having blood pressure and hypertension.