The research was organized into four chapters. The first chapter, the introduction, discusses briefly the purpose of the research which is to explore how interior spaces are divided by planar elements, formal or virtual, types of dividers in interior spaces, and seeks to know what inherent meanings these dividing elements. Encapsulate, Chapter two includes a theoretical background discussion on the formation of architectural space by both linear and planar elements. Chapter three deals with the analysis of selected cases from the works of Frank Lloyd Wright (totaling 20 Building have been Investigated). The analyses were done according to the different categories and kinds of dividers used in the interior spaces. Chapter four is findings and conclusion.