The purpose of this paper is focus on biography and the works of Sunthorn phu, the Thai poet in Rattanakosin early period. His common name is from a part of his Royal given name Phra Sunthorn Vohara. His work is considered to be a major contribution to field of Literature. In 1986, UNESCO honored Sunthorn Phu for his outstanding cultural contributions. He was awarded the title, Great personality of the world, for his contributions to mankind.