In one aspect, an armrest lighting control device of a vehicle according to the present disclosure comprises a switch controller configured to produce a lighting color change effect or produce a fade-in/fade-out effect or an effect of turning off lighting by outputting a lighting-off signal from a lighting turning-off position of a switch lighting unit on the basis of a sensor signal from an acceleration sensor made by detecting a change in upward/downward armrest change angle of an armrest having the switch lighting unit directed toward a rear seat.