Control device for vehicle lamp, vehicle lamp, and method of controlling vehicle lamp

There is provided a control device (228R,228L) for controlling a vehicle lamp (210R,210L) provided in a vehicle. The device includes: a receiver (228R1,228L1) configured to receive an inclination angle (θ) of the vehicle with respect to a horizontal plane from an inclination detector; a controller (228R2,228L2) configured to: i) generate a first control signal instructing the vehicle lamp to adjust an optical axis of the vehicle lamp in response to a change of the inclination angle, when the vehicle has already stopped; and ii) generate a second control signal instructing the vehicle lamp to maintain the optical axis of the vehicle lamp, when the vehicle is traveling on a road surface; and a transmitter (228R3,228L3) configured to transmit the first control signal or the second control signal to an optical axis adjuster provided in the vehicle lamp.