The purpose of this study is the long term development of the physical environment in which social exchange frequently occurs. This paper examines the use of place in the urban area for exchange, and 'stays' as a phenomenon of exchange. This paper also examines the relationship between stationary people and pedestrians as well as stationary people and place by clarifying the behavior of stationary people. This is done through the investigation of urban squares, such as university campus squares, commercial facilities squares, and railway station squares. The results are, (1) the average time of the total 2,705 samples of stationary people on eleven squares is 12.4 minutes; (2) behavior, such as 'eating and drinking,' 'sleeping,' 'reading,' are seen in the place where pedestrian density is low, while 'cell phone' and 'talking' are seen in the place where pedestrian density is high; (3) On the lawn, for larger groups, 'talking' and 'eatingn and drinking' are high and average time of staying is relatively longer.