A liquid discharge apparatus includes: a channel unit including: a discharge port; a first channel through which liquid to be supplied to the discharge port flows; and a second channel communicated with the first channel and the discharge port; an actuator including a first and second electrodes and a piezoelectric layer, and being configured to apply pressure to the liquid in the second channel; and a signal supply unit configured to selectively supply a discharge driving signal and a non-discharge driving signal to the actuator. The discharge driving signal includes a first voltage signal which drives the actuator to discharge the liquid from the discharge port, and the non-discharge driving signal includes a plurality of second voltage signals each of which drives the actuator not to discharge the liquid from the discharge port.