A clothes treatment apparatus including a cabinet having an opening, a drum placed within the cabinet to accommodate laundry therein, and a door assembly configured to open or close the opening. The door assembly includes a second module having a hollowed region and configured to be selectively open or closed in different directions, and a first module, at least a portion of which hermetically seals the hollowed region, the first module being configured not to interfere with opening/closing of the second module. Such an improved configuration of the door assembly ensures easy change in the opening/closing direction of a door.