1. An apparatus for injecting ink to form a pattern by adhering the ink injected from a nozzle onto a substrate, the apparatus comprising:a cartridge nozzle assembly, in a cartridge type, including:
a chamber accommodating the ink so as to seal the ink in the chamber; and
the nozzle for discharging the ink accommodated in the chamber; and
a cartridge nozzle fixing member for replaceably fixing the cartridge nozzle assembly; wherein the cartridge nozzle assembly comprises:
a body including: the chamber forming a space for accommodating the ink in the chamber; and an ink supply path forming a path for supplying ink from an outside of the chamber into the chamber; and
the nozzle including: a nozzle body which is in fluid communication with the chamber and which extends to have a constant tube diameter; and a nozzle tip formed to have a tube diameter tapering toward an end of the nozzle body and configured to discharge the ink; wherein the ink supply path is formed as an ink supply tube inserted into and fixed to a hole communicating between an outer surface of the body and the chamber and formed in a tubular shape to penetrate the chamber and to be spaced apart from a tubular inner surface of the nozzle body.