This is a study on space planning of dental clinic by case analysis of 30 dental clinics that were cons tructed or designed in metropolitan area in recent years, It is analyzed as the following, required basic or additional rooms according to size divisions of gross floor area, relationship of treatment chair number and floor area, ratio of gross floor area and waiting zone, medical treatment zone, supporting zone, management zone, and zoning planning, space types of medical treatment zone, etc. This study can be used as basic data for planning of dental clinic and related future researches.