The purpose of this study is to analyze how open governmental buildings are to the general public by means of questionnaire surveys to those who are concerned in various stages of their planning process and those who actually manage them. Ten functions are selected to examine the degree of their opennes, i.e. parking, observation station, space for standing exhibition, space for special exhibition, facilities for information, restaurants, coffee shops, retail shops, open space, and convention facilities. Main results are as follows. 1) Parking, observation station, space for special exhibition are more 'open' to the public than retail shops and convention facilities. 2) The degree of openness projected at the planning stage is greater than the one actually realized with the exception of parking. 3) Buildings of the lower level of governments are more 'open' to the public than ones of the higher level.
