Interior construction device

Interior fitment device, in particular for a caravan and/or for a motorhome, which has a first area (10), a second area (12), at least one door (14) and at least one wall segment (16), wherein the at least one wall segment (16) and the at least one door (14) separate the first area (10) from the second area (12) in at least a first configuration. It is proposed that the at least one wall segment (16) is designed to be movable in order to establish at least a second configuration.