A liquid jet head configured to jet liquid comprising: a jet section configured to jet the liquid; a plurality of drive boards (13a-13d); at least one drive device which is disposed in each of the drive boards, and which applies a drive signal (Sd) having a predetermined drive waveform to the jet section to thereby cause the jet section to jet the liquid; a waveform setting section configured to perform setting of the drive waveform; a control switch section disposed between the waveform setting section and the plurality of drive boards; an external control line (Lex) in which first control communication between an outside of the liquid jet head and the waveform setting section is performed; an internal control line (Lin) in which second control communication between the waveform setting section and the control switch section is performed; and a plurality of drive control lines (Lda-Ldd) in which third control communication (C3a-C3d) is individually performed between the control switch section and the drive device in each of the plurality of drive boards, wherein the waveform setting section generates second waveform configuration information for setting the drive waveform based on first waveform configuration information transmitted from the outside of the liquid jet head using the first control communication, and the control switch section performs control switch between a transmission control action and a blocking control action when transmitting the second waveform configuration information, which is transmitted from the waveform setting section using the second control communication, to the drive devices using the third control communication (C3a-C3d), wherein in the transmission control action, the second waveform configuration information is transmitted in parallel to the drive devices in at least one drive board in the plurality of drive boards (13a-13d) using the third control communication on at least one drive control line in the plurality of drive control lines (Lda-Ldd), and in the blocking control action, the transmission of the second waveform configuration information using the third control communication is blocked with respect to all of the plurality of drive control lines. a jet section configured to jet the liquid; a plurality of drive boards (13a-13d); at least one drive device which is disposed in each of the drive boards, and which applies a drive signal (Sd) having a predetermined drive waveform to the jet section to thereby cause the jet section to jet the liquid; a waveform setting section configured to perform setting of the drive waveform; a control switch section disposed between the waveform setting section and the plurality of drive boards; an external control line (Lex) in which first control communication between an outside of the liquid jet head and the waveform setting section is performed; an internal control line (Lin) in which second control communication between the waveform setting section and the control switch section is performed; and a plurality of drive control lines (Lda-Ldd) in which third control communication (C3a-C3d) is individually performed between the control switch section and the drive device in each of the plurality of drive boards, wherein the waveform setting section generates second waveform configuration information for setting the drive waveform based on first waveform configuration information transmitted from the outside of the liquid jet head using the first control communication, and the control switch section performs control switch between a transmission control action and a blocking control action when transmitting the second waveform configuration information, which is transmitted from the waveform setting section using the second control communication, to the drive devices using the third control communication (C3a-C3d), wherein in the transmission control action, the second waveform configuration information is transmitted in parallel to the drive devices in at least one drive board in the plurality of drive boards (13a-13d) using the third control communication on at least one drive control line in the plurality of drive control lines (Lda-Ldd), and in the blocking control action, the transmission of the second waveform configuration information using the third control communication is blocked with respect to all of the plurality of drive control lines.