This invention is an apparatus for straightening a guitar bridge or guitar bridge assembly comprising a U-shaped receptacle with a bottom, a first face and a second face; an adjustable drive on the first face that places force on the bridge; and at least two opposing braces on the second face, and wherein the second face is grooved to create a space between the receptacle and the bridge, and wherein the first and second face contain a sight line and the apparatus contains an adjustable drive which is capable of being turned by a hex wrench so that the force of the adjustable drive on one side and the two opposing braces change the shape of the bridge to a desired shape. The invention is also related to a method for straightening a guitar bridge.