Vehicle steering system

A vehicle steering system includes a steering operation mechanism configured to steer a steered wheel, and a steering operation motor configured to apply a drive force for steering the steered wheel to the steering operation mechanism. The steering operation mechanism includes an input shaft to which the drive force from the steering operation motor is input, an output shaft configured to output the drive force from the input shaft to the steered wheel, and a coupling mechanism configured to couple the input shaft and the output shaft to each other. The coupling mechanism includes a first universal joint and a second universal joint that transmit the drive force from the input shaft to the output shaft in a state in which the output shaft is angularly offset from the input shaft. The output shaft constitutes a part of a suspension. 车辆用转向操纵装置包含使转向轮转向的转向机构与将用于使转向轮转向的驱动力赋予转向机构的转向马达。转向机构包含输入有来自转向马达的驱动力的输入轴、将来自输入轴的驱动力输出至转向轮的输出轴以及具有能够在使输出轴相对于输入轴偏转的状态下从输入轴向输出轴传递驱动力的第万向接头以及第二万向接头并连结输入轴以及输出轴的连结机构。另外，输出轴构成悬架的部分。