The subject of the invention is that in a luquid jet head with two rows of nozzles, when ink is ejected from one nozzle, the ink is also ejected from another nozzle or cannot be stably ejected from another nozzle under a condition that a jet channel has two nozzles. To achieve the above subject,the invention provides a liquid jet head including: a nozzle plate including a first nozzle row and a second nozzle row each formed of a plurality of nozzles. The liquid jet head is characterized by comprising a piezoelectric plate including a plurality of first ejection grooves communicating to the plurality of nozzles of the first nozzle row, and a plurality of second ejection grooves communicating to the plurality of nozzles of the second nozzle row, in which each of the plurality of first ejection grooves and each of the plurality of second ejection grooves are separated from each other by a partition wall located between the each of the plurality of first ejection grooves and the each of the plurality of second ejection grooves.