Abstract: In order to provide a portable room suited for human use, the room is provided with a plurality of walls including three solid wall panels and a fourth wall panel defining a door opening for receiving a door therein. The room also includes a door hingedly mounted for movement between opened and closed positions relative to the door opening defined by the fourth wall panel. Each of the wall panels has a wall supporting post operatively associated with at least one of the opposite ends thereof The room also includes hinge means joining each of the wall panels to an adjacent wall panel for collapsible folding movement of the wall panels relative to each other. With this arrangement, a removable ceiling is supported on the wall panels and, in a preferred embodiment, cooperates with the wall panels to maintain adjacent ones in substantially perpendicular relation.