Abstract: A pendulum rod immobilizing device for immobilizing the pendulum rod of a clock in order to prevent damage to the clock by motion of the pendulum rod during transport. The pendulum rod is immobilized by engagement with a pendulum rod retainer provided on the movement case of the clock and is released by the operation of a release member provided on the pendulum rod retainer. The pendulum rod retainer is provided at a position outside the normal range of swing of the pendulum rod so that the immobilizing effect is obtained only when the pendulum rod is deliberately moved considerably beyond its normal range of swing and that the pendulum rod retainer does not interfere with the swing of the pendulum rod during normal use.