Abstract: A collapsible frame structure for a portable camper, particularly a pair of such frame structures which may be joined to form a bed supporting frame and a tent supporting frame extending in an arch over the bed frame. The frame structure includes a plurality of pairs of link tube units pivotably connected at their middles to each other in X-shaped configuration and a plurality of longitudinally extending tube units intermediate the pairs of link tubes. The frame structure is distinguished in its efficiency in set up and folding for storage without disassembly.