Abstract
The purpose of this study is to propose a way of making the master's space of the apartment suitable for new housing need. This study is to research the typology of master's space which is one of the major component of apartment plan. And also transition of the typology and size of master's space were analyzed. The 895 examples of unit floor plan were selected and classified according to the net area. The object of this study is the apartment plan which were constructed in Seoul, Il-san and Bun-dang and whose area is above 100 ㎡. Through this analysis and research, this study is to provide the basic data for actual design process and to suggest future trends of apartment houses.