Constitution of a country is the basic law of the land which provides the rights and duties of citizen along with organization of government, its powers. All the constitutions are equipped with provision for amendment to cope with future needs of the people. This study deals with what extent and range of amendment can be permitted in case of the constitutions of USA, India and Ethiopia. The three constitutions are amendable according their amending provisions and that of India is more flexible to amendments when compared with other two constitutions.