The purpose of this paper is to clarify the spatial characteristics and meanings of pilotis-type detached housing in Okinawa. Here the focus is on morphological characteristics, housing needs and dwelling usages. As survey methods, observations of utilization and interviews were used. Some results show as follows: 1) The pilotis style was decided by dwellers rather than architects at the planning process. Many types of pilotis utilization were observed and it is thought that the provision of spatial diversity. The utilization greatly affects the life-style of dwellers especially for reserved space as extension of housing. 2) The traditional housing plan were adapted to typical pilotis-type detached housing. The public spaces like Japanese style room were strongly reserved inside housing, but events for their relatives is held rarely. 3) Due to the special spatial characteristics of the balcony space, dwellers were able to develop several pattern of using the spaces. Both the outside space and inside spaces are unified to be important in terms of balcony.