Abstract: A vehicle measuring instrument to measure a position-deviation of any selected vehicle reference point as when a person such as a car mechanic performs repair and maintenance of a car. With the well known vehicle measuring instrument of such type, an error caused by a deviation of the perpendicularity indicated by a pendulum member from the vertical direction of the vehicle due to an inclination of this vehicle has been detected and then a troublesome sequence of operations have been performed to compensate such error. According to the present invention, there is provided an angle variable portion by which an angle of each suspender with respect to a base frame can vary under an effect of this base frame's own weight in response to an inclination of the vehicle so that a reference portion is automatically displaced so as to respond to the deviation of the pendulum member and thereby to compensate said error automatically.