A capacitive physical quality detection device includes a sensor part, a control circuit, and a CV conversion circuit. The sensor part includes a movable electrode, a first fixed electrode, and a second fixed electrode. The CV conversion circuit is configured to receive a reference voltage and to output a voltage corresponding to a capacitance change. In a first time period, the control circuit applies a first signal to the first fixed electrode, and applies a second signal, which is opposite in phase to the first signal, to the second fixed electrode. In a second time period, the control circuit applies the reference voltage to the first fixed electrode and applies the second signal to the second fixed electrode.