A drive waveform generating device includes a plurality of waveform generating units each configured to generate and output a drive waveform to a corresponding one of a plurality of pressure generators that are provided corresponding to a plurality of nozzles of a liquid discharge head. Each of the plurality of waveform generating units includes a detector and a waveform generator. The detector is configured to detect data associated with a type of the drive waveform to be applied to at least one pressure generator of the plurality of pressure generators corresponding to at least one adjacent nozzle to a target nozzle. The waveform generator is configured to change a waveform shape of the drive waveform to be applied to one pressure generator of the plurality of pressure generators corresponding to the target nozzle in accordance with the data detected by the detector.