According to the results of the investigation of air condition on a movie hause in Seoul city, for the period August 1948 to August 1949, the results were considerable condition contrary to the expection due to lack of Ventilation. By the above equation, the total air ventilation volume, the avarage air volume of natural ventilation, and the air volume of artifical ventilation to be required of the seven movie hause in Seoul city are discussed (See table in page in this Journal)