There is provided a liquid discharge device including: a printing head; and a head driving circuit that is connected to the printing head via an FFC and outputs a driving signal, in which the driving circuit includes a signal output unit which outputs an analog signal, a transistor pair which is connected to the signal output unit and the FFC and driven with the analog signal output from the signal output unit to output the driving signal to the FFC, a return path which is connected to the FFC and feeds back the driving signal output from the transistor pair to the signal output unit, and an oscillation suppression unit which suppresses oscillation of input from the return path to the signal output unit.