A liquid ejection apparatus including: a head having an ejection face having ejection openings opposed to an ejection space; a capping mechanism including: a facing portion capable of facing the ejection face; and a space definer configured to define the ejection space with the facing portion and the ejection face, the capping mechanism being switchable between a defining state and an open state; a humid-air supplier configured to perform a humidifying operation for supplying humid air into the ejection space; a sensor portion configured to sense temperature and/or humidity near the head; and a controller configured to, when the humidifying operation performed by the humid-air supplier is discontinued, adjust a next humidifying operation based on at least one of the temperature and the humidity sensed within a period extending from the discontinuation of the humidifying operation to the next humidifying operation.