A traction device includes a base panel having a frame member pivotally attached to an edge thereof. The frame member is formed of a telescoping leg with a telescoping arm extending from its upper end. The frame member supports a tensioning cable having a neck harness at a distal end for fastening to a patients head. A proximal end of the cable is attached to a tensioning mechanism slidably mounted on the leg. The tensioning mechanism includes a telescoping, pneumatic cylinder that is extended with a compressible bulb. The cylinder engages a pivotal lever that pulls the cable downwardly when the cylinder is extended, thereby applying tension to the harness.