In the transition process of Chuvash written literature, which has carried on literally for ages, Chuvash folklore has played an efficient role in terms of form and theme features. A similar process of relationship between folklore and literature seen in 19th century in Europe, has also been existed among Chuvashes. Folklore has also played the most important role for not only creating national literature, but also comprising written Chuvash literature. The first poets and authors of modern Chuvash literature, have placed the folkloric materials into the base of their literary works. Mihail Fedorov, who is one of these poets, has chosen the themeArshuri , the mythological creature of Chuvash folklore, in his poem named as Arshuri . This demonic creature, which we confront in many narrations of Chuvash folklore, takes part in this poem, which is one of the first written literary works of Chuvash literature. As the publications in the last terms are taken into consideration, the narrations about Arshuri in Chuvash folklore have occupied quite important place. Because the effects of traditional Chuvash religious beliefs have gone on through Chuvashes till the recent terms, these narrations effects have continued among Chuvashes. The narrations, widespread to this extent through Chuvashes, have been transferred to modern literature by Federov s work. In this essay, how the narrations about Arshuri has reflected to Mihail Fedeorv s poem will be examined.