A load lock device includes a vessel of which an internal pressure is variable between a pressure corresponding to a vacuum chamber and an atmospheric pressure; a purge gas supply source configured to supply a purge gas into the vessel; an exhaust device configured to evacuate an inside of the vessel; a pressure controller configured to adjust the internal pressure of the vessel to be the pressure corresponding to the vacuum chamber and the atmospheric pressure; a cooling member within the vessel configured to cool a substrate while the substrate is placed adjacent thereto; a first purge gas discharging member configured to discharge the purge gas to flow in parallel with the substrate while controlling a turbulent flow thereof; and a second purge gas discharging member formed of a porous material and configured to discharge the purge gas toward a bottom surface of the substrate from below the substrate.