During the course of the study, using an indoor airflow analysis model established for the housing unit, a computer simulation was conducted to investigate the indoor to outdoor and room to room ventilation performances in the multi-family housings. In the computer simulation, the actual measured ventilation performance data are utilized as the input variables for the airflow analysis program, COMIS, in which a network model that considered to be an active indoor airflow analysis method is employed. In this study, a prediction model was developed to evaluate the ventilation performance for the multi-family housings, based on the multiple regression analysis with the data obtained in the computer simulation.