A spinal pantograph - a non-invasive method for describing and documenting the posture of the back in the standing position - is described. Thoracic kyphosis and lumbar lordosis can be recorded by a simple technique. A comparative study of the range of kyphosis and lordosis measured by X-ray and this mechanical device shows a statistically significant correlation. As regards the thoracic kyphosis, the spinal pantograph seems to be as accurate as the X-ray. In lumbar lordosis an underestimation is seen with the clinical device. Compared with non-scoliotic cases, a significantly decreased kyphosis is observed in structural scoliosis, even in cases with a scoliotic angle of less than 30 degrees according to Cobb. The advantage of this spinal pantograph is that it reduces the radiation dosage. It can be used for screening and follow-up examination of the posture especially during the growing stage.