A liquid-droplet ejecting apparatus including: (a) a liquid ejecting head; (b) a liquid supply passage; (c) a suction passage; (d) a sucking device sucking a gas in the liquid supply passage via the suction passage; (e) a gas-permeable film; (f) an opening-and-closing device; (g) a pressure detecting device detecting an internal pressure of the suction passage; (h) a sucking-device control device controlling the sucking device; the sucking-device control device having the sucking device suck the gas in the liquid supply passage when the pressure detecting device detects that the internal pressure is equal to or above a predetermined threshold.