Abstract: Portable solar heater structure comprising a substantially rectangular frame having a back with openings therethrough for permitting air to be drawn into the solar heater, a layer of insulating material in contact with the back, a plurality of cup-shaped solar collectors open toward the front of the solar heater structure positioned adjacent the insulating material, a cover over the front of the solar heater having openings therein adjacent the top thereof through which air heated by the solar heater is passed and a passage between the openings in the back and cover of the solar heater through which relatively cool air is drawn through the openings in the back over the collectors to be heated for subsequent withdrawal through the openings in the cover.