Abstract: A swing training device is described which constrains both arms of an individual to follow a predetermined swing path. The device includes a member for securing about the torso of an individual and arm bands for securing about the arms of the individual. The arm bands are mounted on guide rails mounted on the torso member through connectors which permit the arm bands to slide along the length of the rails. The arm rails are formed of a rigid material which is resistant to bending out of position. Thus, restraining the arm bands to move along a preferred swing path established by the rails. In addition, the member for securing around the torso and the arm bands are constructed to prevent the device from riding up over the torso and arms of an individual into an ineffective position in the armpits of the individual.