A group of 26 out of 32 patients with idiopathic scoliosis treated by lateral external electric stimulation within the last 4 years was examined. In about 80% an arrest of progression or an improvement of the spinal curvature was found within 2 years. The average improvement was 7.6 degrees Cobb. A good effect can be expected in scoliosis with a Cobb angle up to 25 degrees. Analysis showed that good flexibility, low rotation, low Risser sign and Harrington factor seem to be decisive for a successful treatment. Even if the range of electrostimulation can be extended in the future up to higher degrees of spinal curvature it is doubtful that electrostimulation can substitute orthotic treatment in the whole established spectrum.