Abstract: A spring-loaded, impact-type chiropractic device especially useful for repositioning a cervical vertebra in the spinal column of a patient. The device includes a tubular casing having an anvil structure at one end and a spring-biased hammer mounted in the tubing. An elongated spindle is connected to the hammer for drawing the hammer away from the anvil into a loaded position in which the spring is compressed. A releasable detent mechanism is provided which holds the hammer in the loaded position or, when released, allows the hammer to strike the anvil. Preferably, the casing includes two telescopically-interfitted tubular portions and one or more hammer-biasing springs; adjustment of the tubular portions relative to each other determines the amount of compression of the springs with the hammer in the loaded position.