Korea Proletarian Artist Federation (KAPF) is a progressive group of art movement active during the 1920’s and 1930’s. KAPF used to be a specialist group based on the socialist ideology and the largest art movement aiming at the multitude movement under the Japanese occupation. So far studies on KAPF have been lively developed mainly in such areas as the modern history and the modern history of literature. In that the role of Kim Bok-Jin, the artist has been relatively neglected. He used to be a sole artist who was active in the movement of the socialist ideology at the forefront. The core of the thought-literature movement was the activity of the KAPF. But any other member of KAPF than Kim has never been on the forefront of the thought movement. His clear faith in the thought movement and the organization allowed him to take part in the movement and to work on his art side by side. He even has imprisoned more than 5 years for that. Here I tried to newly illuminate KAPF with Kim Bok-Jin at the center of it, and thereby to prove that he played a central role in the organization. His role in KAPF can be summed up like this: First, he was a central figure in forming the foundation of the organization, including the raising and selecting members. Second, he participated in building the background and the orientation of KAPF to the extent that he joined in writing the regulation and the platform of it. Third, he and his colleagues tried to manage KAPF in a broad view of the socialist movement under the occupation. Fourth, as a (secret) member of the Cho-Sun communist party and the representative figure of the socialist art world, he leaded the organization. art. Fifth, he took the initiative in establishing the policy line of KAPF as a multitude group. Sixth, in the end he was one of the guidance division of KAPF. To grasp the facts of KAPF, we need to restart from illuminating the role of Kim Bok-Jin, for he was one of the central figures in the whole process from organizing to running the group. KAPF was never a mere literary group nor the one only for artists. It was a multitude group leaded by artists, which was willing to join the political struggle. On the basis of the socialist thought, it stood against the imperialist Japan, within the context of the contemporary political and social conditions, and Kim Bok- Jin was the central figure. The progressive literary movement under the Japanese imperialism and the sculptor Kim Bok-Jin’s role in KAPF are noteworthy in rewriting the history of KAPF.