A telescopic shaft for a vehicle steering, assembled in a steering shaft of a vehicle and constructed by fitting a male shaft and a female shaft to each other so as to be unable to rotate but to be slidable, the telescopic shaft, has a first torque transferring member interposed via an elastic member between one line of axis-directional groove and one line of axis-directional groove formed respectively on an outer peripheral surface of the male shaft and on an inner peripheral surface of the female shaft; and a second torque transferring member interposed between another line of axis-directional groove and another line of axis-directional groove formed respectively along the outer peripheral surface of the male shaft and along the inner peripheral surface of the female shaft. The elastic member includes a transferring member sided contact portion abutting on the first torque transferring member, a groove sided contact portion spaced away at an predetermined interval substantially in a peripheral direction from the transferring member sided contact portion and abutting on a groove surface of the axis-directional groove of the male shaft or the female shaft; and a biasing portion elastically biasing the transferring member sided contact portion and the groove sided contact portion in such a direction as to separate from each other, wherein a rigidity of the transferring member sided contact portion is differentiated from a rigidity of the groove sided contact portion. |