Abstract: This portable shelter assembly includes a weather-proof container suitable to be mounted on a pair of support bars atop a vehicle. When the vehicle is at a stand still and the shelter assembly is to be made ready for occupancy, the container unfolds to become a deck or platform on which the occupants can sleep. Attached to the deck are a pair of arch members hingedly connected thereto and a folding arch member having knee joints so that all can collapse into the container or be erected to support a tent canopy to shelter the occupants. The shelter assembly should be balanced atop the vehicle, both in its collapsed and its erected positions.Various means are provided for fastening the shelter assembly to the vehicle. The tent may have associated therewith a screen house for protection against insects.