An electric telescopic steering apparatus includes a jacket having a lower jacket and an upper jacket in order to telescope the jacket; and a screw shaft arranged along a longitudinal direction of the jacket and held under a rotation-locked state. The screw shaft includes one end portion supported by one of the lower jacket and the upper jacket. The electric telescopic steering apparatus further includes a nut screwed on another end portion of the screw shaft and supported by another of the lower jacket and the upper jacket; a driving section configured to drive a rotation of the nut; and a displacement absorbing section provided between the one end portion of the screw shaft and the jacket. The displacement absorbing section is configured to permit the one end portion of the screw shaft to be displaced on an X-Y plane defined by an imaginary X-axis and an imaginary Y-axis which are substantially perpendicular to an axis of the screw shaft, and configured to permit an angle of the axis of the screw shaft to vary about the X-axis and the Y-axis.