This paper aims to clarify the component of impression of townscape while walking and to verify the effect of sky factor and the change on the components above-mentioned. The results are; (1) according to the factor analysis, “Calmness”, “Openness”, and “Activity” compose the impression of the city, (2) neither the relation between “Calmness” and sky factor nor change of sky factor are significant, (3) sky factor and change of it define “Openness” of the city significantly, (4) “Activity” of the city appears to be influenced by change of sky factor rather than sky factor itself.
