A light scanning apparatus includes a light source configured to intermittently emit light based on an irradiation timing signal; a mirror configured to reflect the light emitted by the light source; an actuator configured to cause the mirror to be deflected based on drive signals; a sensor configured to output a signal according to deflection of the mirror; an irradiation timing adjusting-unit configured to adjust the irradiation timing signal based on the output signal of the sensor; and an irradiation timing storage configured to store the adjusted irradiation timing signal.