Abstract
The aim of this sudy is to make clear features of thermal environment in the outdoor spaces with plants. Twenty nine sites with and without plants were selected as test points for measurement. Principal component analysis was carried out by using the measured results as descriptive variables, and three principal component axes are obtained. The first can be interpreted as "effect of sunshine", the second as "degree of reradiantion" and the third as "wind speed". The relationship between characteristics of thermal reradiation environment and shape situation was examined by plotting principal component scores of every test points on these principal axes.
