Conceptualizing the inter-Korean relationship under national division as a “division structure” from the theoretical perspective of constructivism, this paper identifies its constituent components and clarifies the structural mechanism through which inter-Korean conflict has been maintained and reinforced. From that structural perspective, it attempts to uncover the fundamental source of inter-Korean conflict as intrinsically rooted in the division structure and as a way to end the cycle of reproduction it has generated. Caught up in the politics of representation, the two Korean states have struggled to beat each other in a zero-sum game of achieving a hegemonic unification of the two Korean states. In the process, the division structure has been reinforced and there exists a dilemma between reconciliation and unification of the Korean Peninsula. This paper argues that as long as the two Koreas hold onto a shared sense of ethnic homogeneity and believe in the possibility of national unification, the vicious cycle of the division structure will not cease; it thus proposes a paradigm shift that globalizes a vision of national unification to overcome the current division structure.