Provided is a mobile cabin set that allows flexible arrangement of layout in a cabin. One aspect of the present disclosure provides a mobile cabin set that includes a cabin body configuring a part of a moving body and including a ceiling surface, a floor surface, and two or more side surfaces that define an interior space; at least one rail arranged on at least one surface of the ceiling surface, or the two or more side surfaces of the cabin body, the at least one rail extending in a direction that intersects a vertical direction; and at least one attachment arranged in the interior space. The at least one rail includes an attachment/detachment mechanism to allow attachment/detachment of the at least one attachment at a given position of the at least one rail.