Batak Karo's Architecture is one of the Indonesian archipelago's architecture which is the result from the local wisdom of the Batak Karo tribe, one of the karonese architectures is the traditional Karo house. Masri Singarimbun explained that karo traditional houses are not only related to their functions but related to the process of establishment and how to dwell in it, there are so many customary rules when establishing and occupying the house. Now the Karo Batak tribe has turned to contemporary architecture and has lost its meaning in its architecture. This study will examine space in karo architecture with space theory that proposed by Christian Noberg Schultz, namely architectural space and existential space. The methodology used in this research is descriptive qualitative. It was found that karo architecture is a manifestation of the world view Batak Karo tribe which considers the world divided into three parts, namely the upper world, the middle world and the underworld and also the concretization of their kinship relationship, beru, senina and kalimbubu, which is called sangkep ngeluh