A liquid ejecting apparatus includes a head unit having a plurality of nozzles ejecting an ink, the head unit including a filter provided with holes through which the ink can pass, a first nozzle row formed by the plurality of nozzles, and a second nozzle row formed by the plurality of nozzles, and a mounting portion on which the head unit is detachably mounted. The nozzles forming the second nozzle row communicate with the nozzles forming the first nozzle row via the filter. A pre-operation of forming gas-liquid interfaces in the holes provided in the filter is executed before the head unit is removed from the mounting portion.