A liquid ejection apparatus includes a holding unit configured to hold a tray on which a container configured to contain liquid to be supplied to an ejection head is detachably mounted, a first restriction unit configured to be movable to a restriction position where the first restriction unit restricts pulling the tray out of the holding unit and to a non-restriction position where the first restriction unit does not restrict pulling the tray out of the holding unit, a connector configured to be in contact with a substrate of the container, and a second restriction unit configured to, in a case where the substrate is in contact with the connector and the first restriction unit is at the restriction position, restrict movement of the first restriction unit to the non-restriction position.

In a liquid discharge device that discharges liquid while relatively rotating a medium and a discharge unit that discharges the liquid, a degradation of quality of the discharged liquid material caused by a difference of a relative moving distance between the medium and the discharge unit per unit time when the liquid is discharged is suppressed. The liquid discharge device includes a discharge unit (3) that discharges liquid from nozzles (4) to a medium (M), a rotating mechanism (14) that relatively rotationally moves the medium (M) and the discharge unit (3) around a rotation axis direction Z crossing a discharge direction of the liquid, and a control unit (6) that controls a discharge frequency of the liquid according to a relative moving distance between the medium (M) and the discharge unit (3) per unit time.