The invention discloses an illumination control device which can easily obtain illumination light having expected chromacity and has more light sources in addition to the special LED devices which are selected in advance. In a calibration mode, correction coefficient which is calculated based on the chromacity measured by a chromacity measuring device, or correction coefficient which correspond to input operations of a user are input to a main ECU (11), and energized duty ratio of respective R, G, B and any other color of the full color LED devices (21-24) are automatically corrected. Even when the LED devices have great differences in terms of specialities, differences of colors corresponding to the differences of venues and differences of object chromacities are suppressed. In the calibration mode, each LED device is turned on with specified energized duty ratio. According to the invention, the identification of a plurality of devices is much easier by turning on the plurality of LED devices in different light-emitting forms.