To provide the forming technique of the stabilizer for vehicles, which has high productivity.

The apparatus 10 for manufacturing the stabilizer includes a first clamp member 25, a second clamp member 35, a third clamp member 45 and a relatively displacing mechanism 50. The relatively displacing mechanism 50 is configured so that the relative displacement between the first clamp member 25 and the second clamp member 35 and the relative displacement between the third clamp member 45 and the second clamp member 35 may be simultaneously generated by relatively moving the second clamp member 35 to the first clamp member 25 and the third clamp member 45.