Kim Gyu-dong was born in Jongseong, North Hamgyeong Province, moved to South Korea in early 1948, has absorbed in writing the reality of the Division of Korea for his whole life, and passed away at 86 in 2011, who is the last poet who defected from North Korea in our age. Many evaluate that Kim Gyu-dong’s poetry changed through modernism in the 1950s sharply to realism around the 1960s. Also, they consider poems after the change more important achievements and results of progress than those before that. However, unlike the discussion that he turned from a modernist to a realist so far, he has had both modernist and realist elements from the beginning to the end of his career as a poet. Just the extent they are exposed at the front in each period of time differed. Among them, his modernist poems in the 1950s, often criticized negatively should not be evaluated based on how much they were developed from modernism in the 1930s any longer. This is because modernism under ‘social aphasia’ of the 1950s in which the 1930s cannot be mentioned even a little served as a ‘struggle for memory’ for modernism in the 1930s. The change of Kim Gyu-dong’s poetic world from the former period into the latter part can, also, be evaluated differently. This is because it is judged that his poetic change reflected his desire to return to 1948 when he ruined his whole life due to a momentary error of judgment or before that, instead of growth and development of his consciousness of the people. His poetic world was defined as ‘something that does not grow’ in order to point this out.