A liquid ejection apparatus includes: a head; a first-liquid-passage member defining a first liquid passage as a portion of a liquid passage connecting between the head and a tank; a second-liquid-passage member, as another portion of the liquid passage, defining a second liquid passage and having a gas permeability less than the first-liquid-passage member; a purging device; and a controller configured to: obtain air-position information relating to a position of air having flowed into the liquid passage from a liquid inlet opening; and execute a liquid discharge processing in which the controller controls the purging device to execute a liquid purging operation such that an amount of the liquid discharged when the air position indicated by the air-position information is located in the second liquid passage is less than that of the liquid discharged when the air position is located in the first liquid passage.