A liquid discharge module includes a valve body configured to openably close a nozzle; a driving body configured to expand and contract in a longitudinal direction of the driving body; a holding body holding the driving body and supporting the valve body at one end of the holding body in the longitudinal direction; a housing having a cylindrical shape and accommodating the holding body; a fixing member contacting against another end of the holding body in the longitudinal direction and including a slotted groove having a gap extending in the longitudinal direction, the fixing member fixed to the housing; and an expansion member configured to widen the gap of the slotted groove to fix an outer peripheral face of the fixing member to an inner peripheral face of the housing.

A liquid ejection device includes a piezoelectric transducer having a plurality of pressure chambers, a plurality of partitions dividing the plurality of pressure chambers, and a plurality of electrodes formed in the plurality of pressure chambers, respectively. The plurality of partitions each includes a first side wall and a second side wall that is positioned on a back surface side of the first side wall. The first side wall includes a first wall surface positioned at an upper portion thereof, the first wall surface being positioned so as to be set back in a normal direction from a second wall surface positioned below the first wall surface. A first electrode is formed on the second wall surface, and a second electrode is formed on the second side wall. An upper end of the second electrode is higher than an upper end of the first electrode.

A liquid ejection device, including a piezoelectric transducer including a plurality of pressure chambers; a plurality of partitions dividing the plurality of pressure chambers; and a plurality of electrodes formed in the plurality of pressure chambers, respectively, wherein the plurality of partitions each include a first side wall and a second side wall that is positioned on a back surface side of the first side wall, wherein the first side wall includes a first wall surface positioned in an upper portion thereof, the first side wall being positioned so as to be set back from a second wall surface positioned below the first wall surface, a first electrode is formed on the second wall surface, a second electrode is formed on the second side wall, and a height of an upper end of the second electrode is larger than a height of an upper end of the first electrode.