According to the Heider's theory on a human relation and an object, the good relation between two habitants is achieved when their evaluations to commodity are same. This theoretical assertion is accepted by the results of the surveys on the extensions of private commodities in alley-space. Also, the results show that the possibility of the occurrence of good relation between habitants is high in the open type alley-space in which the amount of the extensions of commodities is large compared with the closed type alley.
