A Stady of partnership literature of Yamanoueno Okura and Otomono Tabito “Manyoushu” is the oldest collection of Japanese poetry which contains most important literary works on ancient Japan. The compiler is widly believed to be Otomo no yamamochi. In this collection. Many people appear in this collection, especially two people, Otomo no tabito who is the father of Otomo no Iemochi and YamanoUenoOkura. They was active as poets, intellectuals as well as government officials on third period of Yamato. They were born about the same time and both are very important person in terms of the histrical and literary of ancient Japan. This paper roughly aim to examine 3 points given below. 1.How Ottonotabito and YamanoUenoOkura who are important person on third period of Yamato play an active part in the literary world those days? 2. How did their relationship develop and the relationship? 3. How much did the relationship affects the compilation of Manyoushu?