An ink-jet printer comprising: a base material transport mechanism for transporting a base material along a transport path (TR) from upstream to downstream in a transport direction; at least one ink ejection head having a lower surface opposed to said transport path (TR) over said transport path (TR), and an ink ejection port open toward said transport path (TR) in said lower surface and for ejecting ink toward said transport path (TR); and a base plate having an opposite surface opposed to said transport path (TR) over said transport path (TR), and at least one mounting hole open in said opposite surface , said ink ejection head being mounted in said mounting hole , said base plate including an air flow hole that is a through hole penetrating through said base plate , said air flow hole having at least one air outlet open in a location downstream in said transport direction of said ink ejection port in said opposite surface , wherein air passing through said air flow hole is ejected from said air outlet toward said transport path (TR), and wherein said air flow hole is formed by an outer surface of said ink ejection head disposed inside said mounting hole and an inner surface of said mounting hole ; and an air supply unit provided at the upper side of said base plate and for supplying air directed toward said air outlet to said air flow hole ; characterised in that the ink-jet printer further comprises: a sealing material closing a gap between an upstream side in said transport direction on said inner surface of said mounting hole and an upstream side in said transport direction on said outer surface of said ink ejection head . a base material transport mechanism for transporting a base material along a transport path (TR) from upstream to downstream in a transport direction; at least one ink ejection head having a lower surface opposed to said transport path (TR) over said transport path (TR), and an ink ejection port open toward said transport path (TR) in said lower surface and for ejecting ink toward said transport path (TR); and a base plate having an opposite surface opposed to said transport path (TR) over said transport path (TR), and at least one mounting hole open in said opposite surface , said ink ejection head being mounted in said mounting hole , said base plate including an air flow hole that is a through hole penetrating through said base plate , said air flow hole having at least one air outlet open in a location downstream in said transport direction of said ink ejection port in said opposite surface , wherein air passing through said air flow hole is ejected from said air outlet toward said transport path (TR), and wherein said air flow hole is formed by an outer surface of said ink ejection head disposed inside said mounting hole and an inner surface of said mounting hole ; and an air supply unit provided at the upper side of said base plate and for supplying air directed toward said air outlet to said air flow hole ; characterised in that the ink-jet printer further comprises: a sealing material closing a gap between an upstream side in said transport direction on said inner surface of said mounting hole and an upstream side in said transport direction on said outer surface of said ink ejection head . <EOS>