This paper proposes the creation of a Northeast Asian Biodiversity Corridor (NEABC) that would connect in a consistent manner critical habitat in Russia, China, and the Korean Peninsula. Such a corridor may be considered now because of decades of scientific and policy work to establish a DMZ Peace Park, a mountain-watershed ecosystem network in the ROK, nature reserves in the DPRK, and cross-border mega-species migration corridors between the DPRK, China, and Russia. The paper reviews each of these stepping and foundation stones, and refers to proposed regional biodiversity corridors in other regions. It emphasizes parallels between the Northeast Asian context and that of the Mesoamerican Biological Corridor (MBC), an existing regional biodiversity corridor which involves eight Central American countries that, like the two Koreas, are trapped in inter-state conflicts.