Disclosed is an ink jet head driven by a drive IC for ejecting an ink droplet having conductivity, comprising a chamber for storing ink, a nozzle plate attached to the chamber, an actuator provided with an electrode electrically contacting ink in the chamber and activated by a current flowing through the electrode from a power supply, a conductive plate including an opening and glued to the nozzle plate such that the nozzle is exposed through the opening, and a current limiter limiting the current when the ink is purged from the nozzle during a period other than that of ink being ejected. Even if the purge is repeatedly carried out, an extraordinarily rising in temperature of the drive IC and resultant breakdown of the IC can be prevented.