A liquid ejection apparatus including: a head having an ejection face having ejection openings through which liquid is ejected, an ejection space being defined so as to face the ejection face; a sealing mechanism configured to selectively establish a sealing state for sealing the ejection space and an unsealing state; a humid-air supply mechanism configured to supply humid air into the ejection space in the sealing state; and a controller. The controller controls the humid-air supply mechanism to humidify the ejection space such that a humidity in the ejection space becomes equal to or higher than a predetermined humidity. The controller controls the head to perform a non-ejection flushing in at least one of a humidification period in which the humid-air supply mechanism humidifies the ejection space and a post-humidification period that extends for a first period from a completion of the humidification.