To obtain a device capable of obtaining a stable measured result by adequately combining platform side and wheel side laser projectors and wheel side and platform side laser reflection plates.

A laser projector 6A projects a laser light to a platform side front reflection plate 3 fixed to a platform side, then a distance to the platform side front reflection plate 3 is measured. Laser projectors 6B, 6C project a laser light to a platform side upper reflection plate 4, then a distance to the platform side upper reflection plate 4 is measured. A distance to a wheel side laser reflection plate 2 is measured by virtue of a laser light generated by a laser projector A or 7C. The toe angle, camper angle, caster angle and moved amounts in X, Y, Z directions of a wheel are measured by means of a wheel alignment measuring device using the above structure.