To provide a new lumbago belt effectively mitigating the lumbago without making a user feel burden despite being worn for a long period of time, preventing the upward deviation of the lumbago belt and capable of avoiding a trouble in excretion even if being directly worn on the skin.

This lumbago belt is provided with an abdominal belt part covering and tightening the upper parts of the abdominal part and the buttocks, a pair of right/left femur part protection belts for covering the outside of the femur part formed in the abdominal belt part integrally therewith, and a string body for fixing the protection belt to the femur parts, at the lower end edge of the protection belt.