A collapsible cargo container comprises a frame that is attachable to a vehicle, a bed comprising a flexible material, and a spooling mechanism connected to the frame, the spooling mechanism comprising a rotatable bar connected to an end of the bed. When the collapsible cargo container is in an extended position, the bed is supported by the frame so that it can support cargo and when the collapsible cargo container is in a collapsed position, at least a portion of the bed is spooled around the rotatable bar.