Featured is a gripper for a tailgate; such a gripper includes a rotation pad at each regulation surface of a locator and a clamper of each clamping unit, where a swivel ball is mounted on the rotation pad. Each clamping unit is movable in a vertical direction or a horizontal direction by a movement unit of a frame so as to be adaptable to angle differences of each regulation surface of the tailgate. Such a tailgate gripper further includes a frame having a tool mounting portion to mount a tool changer of a robot in a lower portion of a rear surface thereof.