A scanning endoscope system includes an illumination fiber, an actuator section that has one or more pairs of drive sections, each pair being arranged at positions opposite to each other with the illumination fiber intervened in between, and a driver unit that outputs, to one drive section of the pair of drive sections arranged along a predetermined axial direction in the actuator section, a first drive signal having either a first waveform such that a minimum value of a voltage value, which varies periodically with a positive voltage value as a center, is not less than zero, or a second waveform such that a maximum value of a voltage value, which varies periodically with a negative voltage value as a center, is not more than zero, and configured to output, to the other drive section of the pair of drive sections, a second drive signal having the same waveform as the first drive signal and having a phase different from a phase of the first drive signal.
