To provide an optical scanning device and a control method thereof capable of reducing power consumption required for driving and reducing a change in power consumption with a change over time.
An optical scanning device causes a mirror portion to perform a spiral rotation operation with a first driving signal applied to a first actuator and a second driving signal applied to a second actuator as cyclic voltage signals. In a case where a resonance frequency and a resonance Q value of a resonance mode, among resonance modes accompanied by mirror tilt swing around a first axis, closest to a frequency of the cyclic voltage signal are respectively set as f r1 and Q 1 , a resonance frequency and a resonance Q value of a resonance mode, among resonance modes accompanied by mirror tilt swing around a second axis, closest to the frequency of the cyclic voltage signal are respectively set as f r2 and Q 2 , and the frequency of the cyclic voltage signal is f d , a relationship of Q 1 ≠ Q 2 , F r2 r1 , and f r2 × (1 - 1/(1.2 × Q 2 )) ≤ f d ≤ f r1 × (1 + 1/(6 × Q 1 )) is satisfied.