This article discusses the reading subject`s imagination in understanding poetry. For this aspects of imaginative understanding are structured analogical imagination, mutual responsive imagination, and creative imagination from the viewpoint of communication between poetic subject and imaginative subject. And this structured imagination was applied to the poetry text concretely. First of all, analogical imagination based on cultural complex acts as a positive base activating reading subject`s imagination. Mutual responsive imagination is not simply a unconscious correspondence but a rendezvous between one`s consciousness and other`s consciousness, so through this imagination we can also presume a process of critical rendezvous. Imaginative subject using creative imagination continues a poetic subject`s images changing and creating images in poetry. There should be wider discussion of this issue, such as applying a various poetry, and analyzing poetry reading texts. And ultimately it is necessary to make up for educational elements to raise learner`s imagination. It also brings another explanation and I will discuss it in another article.