An isolator system includes first and second isolators respectively forming first and second workspaces hermetically sealed from ambient environment, and a pass box provided between the first and second isolators and forming a transport space enabled to communicate the first and second workspaces while maintaining hermeticity, wherein the pass box has a tray on which an article used in work is mounted, and a moving mechanism enabling movement of the tray toward directions to both sides of the first and second isolators, the tray has a first end on the first isolator side located in the first workspace when moved to the first isolator side, and a second end on the second isolator side located in the second workspace when moved to the second isolator side, and the first and second ends of the tray each has a grip bended downward from a mounting face of the tray.
