A liquid ejecting device including a liquid ejecting head for ejecting a liquid; a liquid supply channel to supply the liquid to the liquid ejecting head; a discharge channel connected to the liquid supply channel through a gas permeable film to discharge a gas in the liquid supply channel; a suction unit connected to the discharge channel and configured to suction a gas in the discharge channel to reduce a pressure therein; a switching unit configured to block the communication of the discharge channel with the suction unit when the gas in the discharge channel is not suctioned; and a discharge detecting unit configured to detect that the gas in the liquid supply channel is suctioned and discharged to the discharge channel by the reduced pressure in the discharge channel when the communication of the discharge channel with the suction unit is blocked by the switching unit.