A liquid drop ejecting device is provided with liquid drop ejecting heads having different specifications from each other and plural dummy load circuits which apply electric loads to the liquid drop ejecting heads, and analogue switches for switching the dummy load circuit which is connected to the liquid drop ejecting heads according to the liquid drop ejecting head to be driven. This circuit includes a data path, which has: a transmitter latch controlled by a transmitter clock in a first clock domain; a receiver latch controlled by a receiver clock in a second clock domain; and an intermediate latch coupled between the transmitter latch and the receiver latch. The cavity unit is constituted by a plurality of sheet members which are stacked on each other. The keel post is attached to a triangular control frame, the base of which forms the control bar.