A spine testing device having bearing supports located at a horizontal distance from one another in order to support opposite ends of an arrow, a measuring unit for determining a spine value of the arrow and a display unit for displaying the spine value. The bearing supports are equipped with a weighing device in order to measure a force emanating from the arrow. A stop is located in an area between the weighing devices at such a height that the arrow can be brought by a specified distance from a horizontal starting position into a bending position by exerting a force at a point of application of the same located between the ends of the arrow, in which bending position the application portion of the arrow lies in contact with the stop. The measuring unit includes an evaluation device having means for establishing a bending force acting on the arrow. The evaluation device includes a calculation formula with at least one reference value, so that the spine value of the arrow can be calculated by means of the calculation formula.