A coupled torsion beam axle (CTBA) has improved compliance characteristics that can control a toe value of a rear wheel to be towed in during steering when the steering is performed in a simple structure. The CTBA includes trailing arms and carriers on which rear wheels are mounted via carrier brackets at both ends of a torsion beam, respectively, a center pipe penetrating in a longitudinal direction of a vehicle at the center of the torsion beam, and a steering rod of which one end is linked to the carrier and the other end is linked to the center pipe.