The aim of this study is to clarify the spatial composition of exterior void space in contemporary architecture forming a street wall. That composition is formed by relationship between arrangement of exterior void space and connection with spaces without site and inside of building. Arrangement is integration of void's position on outside volumes and division of outside volumes. Connection has two ways that accessibility or openness to the eye. Comparing the patterns of composition, they are classified into three groups; passage, end, extension of inside space. An alternative composition is found according to opposite of these groups.
