A liquid jet head has a piezoelectric, a pair of electrodes for applying an electric field, and a drive section for driving the piezoelectric body. The drive section drives the piezoelectric body by setting a voltage of one of the electrodes to a first low voltage having a relatively small absolute value, and by supplying a drive signal of one polarity to the other electrode. The driving section restores the piezoelectric body by setting the voltage of the one electrode to a high voltage having the same one polarity as the drive signal and having a relatively large absolute value, and by setting a voltage of the other electrode to a second low voltage having a relatively small absolute value. The drive section applies a voltage for generating an electric field exceeding a coercive field of the piezoelectric body to the pair of electrodes.