The purpose of this study is to clear the relation of spatial physical elements to spatial perception in various exterior space formed by buildings. At first, three factors of spatial impressions were defined with Semantic Differential Technique : 'quality', 'complexity' and 'spread'. So we checked through the relations between these three factors and a variety of spatial elements. As a result, we grasped the relation of number of the additional elements to 'complexity' and the relation of basic elements' ratio to 'spread'. And we found out that the impressions about 'quality' was decided by the gestalt effects of the spatial elements.