A liquid discharge apparatus configured to discharge the liquid onto an object and comprising a head unit (HU) comprising a liquid discharge head including: a nozzle plate having a nozzle ; a liquid chamber configured to store a liquid to be discharged from the nozzle ; a valve body in the liquid chamber , the valve body being movable between a contact position at which the valve body contacts the nozzle plate to close the nozzle and a separated position at which the valve body is separated from the nozzle plate to open the nozzle ; a valve body coupler coupled to the valve body ; and a driver configured to drive the valve body coupler to move the valve body ; and circuitry configured to move the valve body between the contact position and the separated position to open and close the nozzle in a first operation; and apply vibration to the valve body while the valve body is temporarily held at the separated position in a second operation, wherein the liquid discharge apparatus further comprises a pressure mechanism configured to pressurize the liquid in the liquid chamber , characterized in that the circuitry is further configured to execute the first operation while the pressure mechanism applies a pressure to the liquid in the liquid chamber to discharge the liquid from the nozzle ; and execute the second operation while the pressure mechanism temporarily stops application of the pressure to the liquid in the liquid chamber . a head unit (HU) comprising a liquid discharge head including: a nozzle plate having a nozzle ; a liquid chamber configured to store a liquid to be discharged from the nozzle ; a valve body in the liquid chamber , the valve body being movable between a contact position at which the valve body contacts the nozzle plate to close the nozzle and a separated position at which the valve body is separated from the nozzle plate to open the nozzle ; a valve body coupler coupled to the valve body ; and a driver configured to drive the valve body coupler to move the valve body ; and a nozzle plate having a nozzle ; a liquid chamber configured to store a liquid to be discharged from the nozzle ; a valve body in the liquid chamber , the valve body being movable between a contact position at which the valve body contacts the nozzle plate to close the nozzle and a separated position at which the valve body is separated from the nozzle plate to open the nozzle ; a valve body coupler coupled to the valve body ; and a driver configured to drive the valve body coupler to move the valve body ; and circuitry configured to move the valve body between the contact position and the separated position to open and close the nozzle in a first operation; and apply vibration to the valve body while the valve body is temporarily held at the separated position in a second operation, wherein the liquid discharge apparatus further comprises a pressure mechanism configured to pressurize the liquid in the liquid chamber , characterized in that the circuitry is further configured to execute the first operation while the pressure mechanism applies a pressure to the liquid in the liquid chamber to discharge the liquid from the nozzle ; and execute the second operation while the pressure mechanism temporarily stops application of the pressure to the liquid in the liquid chamber . execute the first operation while the pressure mechanism applies a pressure to the liquid in the liquid chamber to discharge the liquid from the nozzle ; and execute the second operation while the pressure mechanism temporarily stops application of the pressure to the liquid in the liquid chamber . <EOS>