A nozzle cleaning method of cleaning a dispenser nozzle with which liquid is sucked and discharged, the method comprising: a first cleaning step of cleaning an outer wall of the dispenser nozzle after liquid is sucked and before the liquid is discharged; and a second cleaning step of cleaning at least an inner wall of the dispenser nozzle after the liquid is discharged by discharging cleaning fluid from the dispenser nozzle, wherein the first cleaning step comprises inserting the dispenser nozzle into a cleaning device that comprises a jet cleaning-fluid supplier for jet-cleaning of the dispenser nozzle and a retention unit in which cleaning fluid is retained arranged below said jet cleaning-fluid supplier, wherein the first cleaning step includes: moving the dispenser nozzle downwards in a longitudinal direction thereof while having the dispenser nozzle entered into a flow path of cleaning fluid being supplied from the jet cleaning-fluid supplier; wherein the first cleaning step comprises: inserting the dispenser nozzle further into the retention unit such that the dispenser nozzle is immersed into the cleaning fluid retained in the retention unit; and continuing supply of the cleaning fluid by the jet cleaning-fluid supplier so as to further clean the outer surface of the dispenser nozzle moving upward along a longitudinal direction of the dispenser nozzle in a state where the dispenser nozzle is in the flow path of the cleaning fluid supplied from the nozzle (61 a). a first cleaning step of cleaning an outer wall of the dispenser nozzle after liquid is sucked and before the liquid is discharged; and a second cleaning step of cleaning at least an inner wall of the dispenser nozzle after the liquid is discharged by discharging cleaning fluid from the dispenser nozzle, wherein the first cleaning step comprises inserting the dispenser nozzle into a cleaning device that comprises a jet cleaning-fluid supplier for jet-cleaning of the dispenser nozzle and a retention unit in which cleaning fluid is retained arranged below said jet cleaning-fluid supplier, wherein the first cleaning step includes: moving the dispenser nozzle downwards in a longitudinal direction thereof while having the dispenser nozzle entered into a flow path of cleaning fluid being supplied from the jet cleaning-fluid supplier; moving the dispenser nozzle downwards in a longitudinal direction thereof while having the dispenser nozzle entered into a flow path of cleaning fluid being supplied from the jet cleaning-fluid supplier; wherein the first cleaning step comprises: inserting the dispenser nozzle further into the retention unit such that the dispenser nozzle is immersed into the cleaning fluid retained in the retention unit; and continuing supply of the cleaning fluid by the jet cleaning-fluid supplier so as to further clean the outer surface of the dispenser nozzle moving upward along a longitudinal direction of the dispenser nozzle in a state where the dispenser nozzle is in the flow path of the cleaning fluid supplied from the nozzle (61 a). inserting the dispenser nozzle further into the retention unit such that the dispenser nozzle is immersed into the cleaning fluid retained in the retention unit; and continuing supply of the cleaning fluid by the jet cleaning-fluid supplier so as to further clean the outer surface of the dispenser nozzle moving upward along a longitudinal direction of the dispenser nozzle in a state where the dispenser nozzle is in the flow path of the cleaning fluid supplied from the nozzle (61 a).