A control device for a vehicle lamp, the control device comprising: a receiving unit that receives a signal indicating an output value from a tilt sensor enabled for deriving an angle of inclination of a vehicle relative to a horizontal plane; a controlling unit that outputs an adjustment signal instructing that an optical axis angle (θo) of the vehicle lamp be adjusted with respect to a change in the angle of inclination observed while the vehicle is at rest and either refrains from generating or outputting the adjustment signal or outputs a maintaining signal instructing that the optical axis angle (θo) be maintained with respect to a change in the angle of inclination observed while the vehicle is traveling; and a movement determining unit that determines whether the vehicle has moved while an ignition switch is in an off state, wherein the controlling unit outputs the adjustment signal with respect to a change in the angle of inclination observed while the ignition switch is in an off state if the movement determining unit has determined that the vehicle has not moved and either refrains from generating or outputting the adjustment signal or outputs the maintaining signal with respect to a change in the angle of inclination observed while the ignition switch is in an off state if the movement determining unit has determined that the vehicle has moved, characterized in that, the movement determining unit determines whether the vehicle has moved while the ignition switch is in an off state on the basis of any one or more of position information of the vehicle, and information regarding an object in surroundings of the vehicle. a receiving unit that receives a signal indicating an output value from a tilt sensor enabled for deriving an angle of inclination of a vehicle relative to a horizontal plane; a controlling unit that outputs an adjustment signal instructing that an optical axis angle (θo) of the vehicle lamp be adjusted with respect to a change in the angle of inclination observed while the vehicle is at rest and either refrains from generating or outputting the adjustment signal or outputs a maintaining signal instructing that the optical axis angle (θo) be maintained with respect to a change in the angle of inclination observed while the vehicle is traveling; and a movement determining unit that determines whether the vehicle has moved while an ignition switch is in an off state, wherein the controlling unit outputs the adjustment signal with respect to a change in the angle of inclination observed while the ignition switch is in an off state if the movement determining unit has determined that the vehicle has not moved and either refrains from generating or outputting the adjustment signal or outputs the maintaining signal with respect to a change in the angle of inclination observed while the ignition switch is in an off state if the movement determining unit has determined that the vehicle has moved, characterized in that, the movement determining unit determines whether the vehicle has moved while the ignition switch is in an off state on the basis of any one or more of position information of the vehicle, and information regarding an object in surroundings of the vehicle.