To enable a wide and comfortable living space to be obtained by enabling an inter-car space to be expanded to vehicle lateral side by expanding sideways the vehicle side plates and a floor forming plate when the vehicle is stopped and used as a living space while making proper running with a limited vehicle width by setting the vehicle side plates and the floor forming plate in their closed state when the camping car is running.

In a camping car, a vehicle side plate 1 is connected in pivotal state 1a to a vehicle body on its roof side end part to be able to make opening turning motion outward and also a floor forming plate 2 is provided inside the vehicle side plate 1 so that the floor forming plate 2 may be able to make opening turning motion outward while being connected to the vehicle body in pivotal state 2a at its vehicle body side end part so as to form an inter-car space 3 between the vehicle side plate 1 making its opening turning motion and the floor forming plate 2.