REAR SUSPENSION DEVICE

PROBLEM TO BE SOLVED: To provide a rear suspension device capable of regulating toe-out change by increasing toe-in change of a trailing arm combination at turn driving time of a vehicle.SOLUTION: The rear suspension device includes: the trailing arm combination TC including a wheel shaft support section 9 for supporting a wheel W, and a trailing arm 12 provided at a vehicle front side, which is pivotally supported by a vehicle body; upper and lower arms 15 and 16 which connect a vehicle body side to an upper part and a lower part of the wheel shaft support section 9, which are formed at a vehicle rear side from a wheel shaft of the wheel W; an elasticity displacement promotion section c1 formed in the trailing arm, which promotes displacement; and a stopper lever 37 extending from the wheel shaft support section 9, which is freely fit into the trailing arm at a vehicle front side from the elasticity displacement promotion section. The stopper lever allows displacement of the trailing arm, when load to inside a cabin in a vehicle width direction acts, and regulates displacement of the trailing arm, when load to outside the cabin in the vehicle width direction acts.