This thesis attempts to study on Seo Cheong-Ju's poetry concernimg about mythical charactor. Seo Cheong-Ju is a most representative poet in korean modern poetry’s history, who has published poetical works of 15 volumes since publishing Whasagip in 1941. Although article about he’s poetry is so many as like oher outstanding poet, Kim So-Wall, Cheong Chi-Yong, but poet’s attitude has been criticized for literature study. If we would find a he’s poetry and charactor, it will be a mythical charactor. Rene Wellck and Austin Warren, in the Theory of Literature, said that myth is narrative, story, as against dialectical discourse, exposition. So I Think about mythical charactor in poetry is indicate to naturalism in literature. Seo Cheong-Ju has called for he’s poetic vision to apporoach of ‘Life’ or ‘Human being’ by himself. I would devide two point or charactor, one is two axis of life and death, another is symbolic of world(conscious of reality). It’s meaninful to poetic process, and essentially of he’s poetic charactor. These point to take up mythical thinking and to insight self- identity for poetic express.