Neem is found all over in India and botanists and nature lovers know the importance of this tree. Its leaves and the extracts can be taken internally and externally. The tree?s Sanskrit name ?arishtha? means ?reliever of sickness?. In Kenya and other countries of Africa it is known as ?Mwarubaini? which means ?reliever of forty human disorders?. Neem is one of the most popular, auspicious and well known tree which is more extensively studied for its pharmaceutical and clinical properties. Neem is used as soil fertilizer, insect repellant, insecticide, animal fodder, dye, wax, fuel, lubricant, soap, mouth hygiene products and it finds a unique place in ayurveda, siddha and unani medicines. It is also called the domestic doctor in India and society called it the kalpavriksha of the earth. Besides, its timber is used in industry, its bark for medicines, and the trees are extensively grown for making the countryside green, for giving shade and for medicinal and environmental purposes. The book gives all the names of neem in different languages, its uses, and synonymns. The book gives in detail various diseases, their symptoms and their cure using neem through ayurveda. Hypertension, cancer and even AIDS, skin disorders and other internal and external diseases can be controlled and possibly cured by using neem and its extracts.