A liquid jet head comprising: an actuator plate having a plurality of first ejection grooves (C1e); a nozzle plate having first nozzle holes communicated with the first ejection grooves; and a nozzle guard having a first rib adapted to support the nozzle plate, and a first communication hole adapted to communicate each of the first nozzle holes and an outside with each other, wherein the first rib has contact with the nozzle plate at a position which fails to be opposed to an opening on the nozzle plate side of each of the first ejection grooves, the actuator plate further includes a plurality of second ejection grooves (C2e), the nozzle plate further includes second nozzle holes communicated with the second ejection grooves, the nozzle guard further includes a second rib adapted to support the nozzle plate, and a second communication hole adapted to communicate each of the second nozzle holes and the outside with each other, both of the first rib and the second rib have contact with the nozzle plate at a position which fails to be opposed to an opening on the nozzle plate side of each of the first ejection grooves, and a position which fails to be opposed to an opening on the nozzle plate side of each of the second ejection grooves, the actuator plate has a first groove column in which the plurality of first ejection grooves (Cle) and a plurality of first non-ejection grooves (C1d) are alternately arranged in a first direction, and a second groove column in which the plurality of second ejection grooves (C2e) and a plurality of second non-ejection grooves (C2d) are alternately arranged in the first direction, the first groove column and the second groove column are disposed so as to be opposed to each other via a predetermined gap in a second direction crossing the first direction, the first ejection grooves (Cle) and the second ejection grooves (C2e) each extend in the second direction, the first non-ejection grooves (C1d) and the second non-ejection grooves (C2d) each extend in the second direction longer than the first ejection grooves and the second ejection grooves, the first rib has contact with the nozzle plate at a position opposed to an opening on the nozzle plate side of each of the first non-ejection grooves (C1d), and a position which fails to be opposed to an opening on the nozzle plate side of each of the second non-ejection grooves (C2d), and the second rib has contact with the nozzle plate at a position which fails to be opposed to an opening on the nozzle plate side of each of the first non-ejection grooves (C1d), and a position opposed to an opening on the nozzle plate side of each of the second non-ejection grooves (C2d). an actuator plate having a plurality of first ejection grooves (C1e); a nozzle plate having first nozzle holes communicated with the first ejection grooves; and a nozzle guard having a first rib adapted to support the nozzle plate, and a first communication hole adapted to communicate each of the first nozzle holes and an outside with each other, wherein the first rib has contact with the nozzle plate at a position which fails to be opposed to an opening on the nozzle plate side of each of the first ejection grooves, the actuator plate further includes a plurality of second ejection grooves (C2e), the nozzle plate further includes second nozzle holes communicated with the second ejection grooves, the nozzle guard further includes a second rib adapted to support the nozzle plate, and a second communication hole adapted to communicate each of the second nozzle holes and the outside with each other, both of the first rib and the second rib have contact with the nozzle plate at a position which fails to be opposed to an opening on the nozzle plate side of each of the first ejection grooves, and a position which fails to be opposed to an opening on the nozzle plate side of each of the second ejection grooves, the actuator plate has a first groove column in which the plurality of first ejection grooves (Cle) and a plurality of first non-ejection grooves (C1d) are alternately arranged in a first direction, and a second groove column in which the plurality of second ejection grooves (C2e) and a plurality of second non-ejection grooves (C2d) are alternately arranged in the first direction, the first groove column and the second groove column are disposed so as to be opposed to each other via a predetermined gap in a second direction crossing the first direction, the first ejection grooves (Cle) and the second ejection grooves (C2e) each extend in the second direction, the first non-ejection grooves (C1d) and the second non-ejection grooves (C2d) each extend in the second direction longer than the first ejection grooves and the second ejection grooves, the first rib has contact with the nozzle plate at a position opposed to an opening on the nozzle plate side of each of the first non-ejection grooves (C1d), and a position which fails to be opposed to an opening on the nozzle plate side of each of the second non-ejection grooves (C2d), and the second rib has contact with the nozzle plate at a position which fails to be opposed to an opening on the nozzle plate side of each of the first non-ejection grooves (C1d), and a position opposed to an opening on the nozzle plate side of each of the second non-ejection grooves (C2d).