A robotic arm is for holding a molded item. The robotic arm includes a mount; a first horizontal driving device movably mounted to the mount in a first direction; a mounting board mounted to the first horizontal driving device; a second horizontal driving device including a seat mounted to the mounting board, a gear rotatably mounted to the seat, a toothed rack engaging the gear and a motor driving the gear to rotate relative to the seat; and a holder for holding the molded item, the holder mounted to the toothed rack. The first horizontal driving device drives the mounting board to move in a second direction perpendicular to the first direction, the gear rotates to drive the toothed rack to move in a third direction perpendicular to the first direction and the second direction.