PURPOSE: To provide a measuring device having a simple structure with less vibration by linearly scanning a plurality of positions on a coil with a plurality of leaser beams with the use of a transverse runner, and by traversing the transverse runner during the scanning so as to collect data necessary for the positional measurement.

CONSTITUTION: A laser distance meter 30 is attached, facing downward, to a transverse runner 20 which can freely run in the X-axial direction above a coil 10 introduced into a coil yard, and which can slightly move in the Y-axial direction. The laser distance meter 30 has a plurality of projecting parts Pa to P11 for projecting laser beams right downward, which are located in the center part of the transverse member 20 in the X-axial direction, and which are arranged at predetermined pitches in the Y-axial direction. The laser distance meter 30 receives reflected beams of the laser beams projected from the projecting parts P1 to P12 at light receiving parts M1, M2 so as to measure distances to reflecting points. A controller stores therein distances to a plurality of points measured by the laser distance meter 30, corresponding to the moving positions of the transverse runner 20, and performs several kinds of computation for specifying the position of the coil.