The cervical traction/stretch device kit comprises a cervical traction/stretch device including an expandable bellows section which is made of non-elastic and non-stretchable material. The device further includes a shoulder section which can be fixed to or made integral with the bellows section. At least two, preferably three, interchangeable head sections are provided so that substantially all human head sizes can be supported by the device. Also provided is a head frame section which is releasably assembled with one of the head sections, the bellows section and the shoulder section to provide a cervical traction/stretch device. The bellows section, the shoulder section and the head section have aligned U-shaped openings therein adapted to receive and support a patient's neck. A pumping mechanism, preferably including an air pump and pressure relief structure are connected to the bellows section for pumping air into the bellows section for expanding the bellows section and for relieving or releasing air out of the bellows section. A triangular-in-cross-section base is provided in the kit for supporting the device at a small angle to the horizontal.