Patrick Geddes is known as a sociologist, a geographer, and a city planning scholar. Geddes's name appears as a scholar of the beginning in the field of city planning study or city geography. Research of the sociology about a city appeared as "Civic Sociology" by P. Geddes in Britain at first. The method of research developed by L. Mumford. Moreover, it was succeeded by C. Zueblin also in Chicago. Although Geddes advocated the urban study by sociology, it is not an overstatement to hear his name in the world of sociology at all, although there is nothing. Why did it become such a thing? Research of the sociology about a city is done to have been started in Chicago of the 1920s. Then, R. E. Park played the big role. Publication of the "City" in 1925 by R.E. Park, E.W. Burgess, and R. D. McKenzie was what tells birth of sociological urban study. They are separating the side of social welfare or city planning from an urban problem, and asked for new urban study. "Urban Sociology" as urban study based on the scientific sociology which uses human ecology as a theoretical support here was produced. A rapid change of the latest society needs reconsideration of the state of research like social science of city life. Research of urban sociology has indispensable relation with city planning or social welfare. In the meaning, research of urban sociology needs the check of the starting point. Of course, it is not retrospection of the mere starting point. City planning and social welfare have come to form a form original during the first [ about ] century as a nation-state of each country. However, it will never be useless to go back to the starting point and to examine urban sociology here. It is not an overstatement although there has been no name of Geddes in research of the sociology about a city since Fukutaro Okui. And there was no sociologist who takes the view different from him. Geddes was not told between the researchers of sociology. Even if Geddes's urban study is rediscovery in the field of city planning study or geography, in sociology, it is discovery and is not rediscovery.