本发明包括用于排出液滴的头的喷嘴孔（36）形成的主体（30），在喷射头和用于冷却的冷却机构（34），所述头本体（20）（20） 中，喷嘴孔的喷嘴表面（36）被打开（38），其围绕喷嘴孔的开口部（36）（52），其被形成为包围所述斥水性区域（52）形成的斥水性区域的亲水性 它是那些具有区域（50）组成的。 通过这种构造，喷射头的温度上升被抑制，从而防止喷嘴面的干燥。 此外，能够抑制液滴附着在喷嘴表面上，它落到打印介质上。

The present invention includes a head nozzle holes for ejecting droplets (36) formed the body (30), in the ejection head and a cooling mechanism for cooling (34) the head body (20) (20) , the nozzle surface where the nozzle holes (36) is opened (38), the water repellent region is formed around the opening of the nozzle hole (36) (52), which is formed so as to surround the water repellent region (52) hydrophilic it is those composed out with regions (50).
By the constitution, the temperature rise of the ejection head can be suppressed, thereby preventing the drying of the nozzle surface. Further, it is possible to suppress that the droplets adhering to the nozzle surface and fall to the print medium.