A traction device for neck physical therapy includes a control unit, a knob unit having a transmission disc, a knob and a force applying cable, and the transmission disc and the knob being pivotally installed at the control unit, and the knob being linked to a transmission shaft, and an end of the force applying cable being fixed to the transmission disc a body unit a force indication unit, including a load positioning module, an elastic member, a thrust cable and an indicator, and the load positioning module being installed in the body unit and linked to the force applying cable, and the elastic member having two fixing ends, one being fixed to the load positioning module, and the thrust cable being coupled to the load positioning module and the indicator and a transfer unit, fixed to the load positioning module and slidably installed on the body unit.
