Smoke spreads rapidly into elevator shaft or stairwell and can result in many casualties when fire occurs in high-rise building. However, the pressure difference on the smoke control system can be changed because hot gas and toxic gas generated from fire. Also, it can be affected the performance of smoke control system because the pressure field in the shaft is strongly disturbed when elevator is moving. In this study, the effect of fire and elevator was analyzed numerically and experimentally on the pressure difference between vestibule and living room in the 3 stories model building.