Abstract: Small conventional saddles squeeze the buttocks area strongly, whereas large conventional saddles have the effect that the buttocks area slips over the saddle during pedaling. When a bicycle is only used occasionally, both situations have unpleasant consequences, at least when large distances are covered. The present bicycle seat prevents pain in that it consists of two seat halves that are other and follow the cranking motion exerted by the legs of the rider in opposite directions. As a result, the position of the hip joint of the rider remains substantially unchanged. The bicycle seat permits an upright and ergonomic sitting posture.