An optical deflection apparatus comprising: a moveable unit having a reflection face; and a support unit including a zig-zag unit (210a, 210b) having a plurality of beams (108a, 108b) continuously formed with a zig-zag pattern to support the moveable unit oscillate-ably about one axis, the plurality of beams including a plurality of first beams and a plurality of second beams, the first beams and the second beams being disposed adjacently; and a plurality of piezoelectric elements (11, 12) disposed for the plurality of beams (108a, 108b) respectively, the plurality of piezoelectric elements including a plurality of first piezoelectric elements disposed on the plurality of the first beams one by one, and a plurality of second piezoelectric elements disposed on the plurality of the second beams one by one, a controller configured to apply drive voltages to the plurality of piezoelectric elements (11, 12), wherein a first drive signal having a first sawtooth waveform is input by the controller to the first piezoelectric element disposed on each of the first beams, and a second drive signal having a second sawtooth waveform being the reverse of the first sawtooth waveform is input by the controller to the second piezoelectric element disposed on each of the second beams, wherein the symmetry of the first drive signal and the symmetry of the second drive signal are set differently while the drive frequencies of the first and the second waveform are equal, wherein the symmetry of the first drive signal and the symmetry of the second drive signal is defined as the ratio between a rising or falling period of the drive signal and the cycle of the drive signal, so that the lowest resonance frequency among a plurality of resonance frequencies belonging to the moveable unit is set to lie between a null frequency of the first drive signal and a null frequency of the second drive signal, wherein the null frequency fn represents the minimum of the envelope of the Fourier spectrum of a cyclical sawtooth drive signal and is defined as fn = N x fs/(1-S), N being an integer, fs being the drive frequency and S the symmetry, the first drive signal A comprises two adjacent harmonic frequencies ha1 and ha2 sandwiching the null frequency fna of the first drive signal A and a frequency range between the two harmonic components ha1 and ha2 is set as first null frequency band P, the second drive signal B comprises two adjacent harmonic frequencies hb1 and hb2 sandwiching the null frequency fnb of the second drive signal B and a frequency range between the two harmonic components hb1 and hb2 is set as second null frequency band Q, and the first null frequency band P and the second null frequency band Q overlap partially, and the lowest resonance frequency of the optical deflector exists in said overlapping portion. a moveable unit having a reflection face; and a support unit including a zig-zag unit (210a, 210b) having a plurality of beams (108a, 108b) continuously formed with a zig-zag pattern to support the moveable unit oscillate-ably about one axis, the plurality of beams including a plurality of first beams and a plurality of second beams, the first beams and the second beams being disposed adjacently; and a plurality of piezoelectric elements (11, 12) disposed for the plurality of beams (108a, 108b) respectively, the plurality of piezoelectric elements including a plurality of first piezoelectric elements disposed on the plurality of the first beams one by one, and a plurality of second piezoelectric elements disposed on the plurality of the second beams one by one, a controller configured to apply drive voltages to the plurality of piezoelectric elements (11, 12), wherein a first drive signal having a first sawtooth waveform is input by the controller to the first piezoelectric element disposed on each of the first beams, and a second drive signal having a second sawtooth waveform being the reverse of the first sawtooth waveform is input by the controller to the second piezoelectric element disposed on each of the second beams, wherein the symmetry of the first drive signal and the symmetry of the second drive signal are set differently while the drive frequencies of the first and the second waveform are equal, wherein the symmetry of the first drive signal and the symmetry of the second drive signal is defined as the ratio between a rising or falling period of the drive signal and the cycle of the drive signal, so that the lowest resonance frequency among a plurality of resonance frequencies belonging to the moveable unit is set to lie between a null frequency of the first drive signal and a null frequency of the second drive signal, wherein the null frequency fn represents the minimum of the envelope of the Fourier spectrum of a cyclical sawtooth drive signal and is defined as fn = N x fs/(1-S), N being an integer, fs being the drive frequency and S the symmetry, the first drive signal A comprises two adjacent harmonic frequencies ha1 and ha2 sandwiching the null frequency fna of the first drive signal A and a frequency range between the two harmonic components ha1 and ha2 is set as first null frequency band P, the second drive signal B comprises two adjacent harmonic frequencies hb1 and hb2 sandwiching the null frequency fnb of the second drive signal B and a frequency range between the two harmonic components hb1 and hb2 is set as second null frequency band Q, and the first null frequency band P and the second null frequency band Q overlap partially, and the lowest resonance frequency of the optical deflector exists in said overlapping portion.