an ink jet recording head unit includes a plurality of nozzle elements , a plurality of piezoelectric elements and a driving unit . the plurality of piezoelectric elements is provided in one - to - one correspondence with the plurality of nozzle elements . each piezoelectric element has a positive pole and a negative pole . each piezoelectric element expands and contracts when a voltage potential difference between the positive pole and the negative pole is varied . the plurality of nozzle elements includes a first nozzle element and a second nozzle element adjacent to the first nozzle element . a first piezoelectric element and a second piezoelectric element correspond to the first nozzle element and the second nozzle element respectively . the driving unit controls the first piezoelectric element and the second piezoelectric element to expand and contract in a complementary manner .