Provided is a load lock device which includes: a container with an opening formed therein and configured to be selectively maintained at an atmospheric environment and a vacuum atmosphere; a holding unit arranged within the container and configured to hold objects to be processed; an elevation mechanism configured to vertically move the holding unit; and a pressure regulating mechanism configured to vacuum-evacuate the container through the opening of the container. The elevation mechanism includes at least two vertically-extended elevation shaft members connected to the holding unit; and a drive unit configured to vertically move the elevation shaft members. The elevation shaft members are arranged opposite each other with the opening interposed therebetween.