Abstract: To provide a vehicle stabilizer for high stress in which fatigue life of a bending portion can be prolonged and which can exhibit excellent durability. A configuration of a bending portion 16, to which a maximum stress is applied and which is the most fragile part, of a vehicle stabilizer for high stress 10 is formed in a state which satisfies conditions: 0<??4 and (?×d/R)?2 wherein d represents a material diameter before bending process, R represents a radius of bending of the bending portion 16, d1 represents a short axis dimension of a cross section of the bending portion 16, d2 represents a long axis dimension of a cross section of the bending portion 16, and a flat rate ? of a cross section of the bending portion 16 is represented by the following equation: ?=(d2?d1)/d2×100.

Abstract: To provide a vehicle stabilizer for high stress in which fatigue life of a bending portion can be prolonged and which can exhibit excellent durability. A configuration of a bending portion 16, to which a maximum stress is applied and which is the most fragile part, of a vehicle stabilizer for high stress 10 is formed in a state which satisfies conditions: 0<??4 and (?×d/R)?2, wherein d represents a material diameter before bending process, R represents a radius of bending of the bending portion 16, d1 represents a short radius of a cross section of the bending portion 16, d2 represents a long radius of a cross section of the bending portion 16, and a flat rate ?0 of a cross section of the bending portion 16 is represented by the following equation: ?=(d2?d1)/d2×100. Accordingly, concentration of shearing stress on the bending portion 16 during a load input can be suppressed to prevent the vehicle stabilizer for high stress 10 from being broken due to the concentration of stress on the bending portion 16.