The purpose of this paper is to investigate and grasp the present state of designation of districts by municipalities on Preservation Distiricts for Groups of Historic Buildings, as well as to study the characteristics of changing situation of the designation. It claryfies the present state and characteristics of spatial constiuion of the designated districts and measures of landscape design in the districts. The result is as follows; In recent years a growing number of municipalities designate several districts or area surrounding the Preservation Districts. It is considered to be one of the measures on the present system which help preservation and creation of historic landscape.