The utility model relates to an illuminating device, particularly to an illuminating device which comprises an organic electroluminescent component. The illuminating device comprises a substrate and a light emitting member arranged on the substrate, wherein the light emitting member includes a plurality of light emitting units; each light emitting unit includes a switch member and at least two light emitting pixels; each light emitting pixel of the same light emitting unit is controlled by the switch member. The illuminating device provided by the utility model is protected from integral failure due to fault of a certain light emitting pixel, and can greatly reduce light emission non-uniformity caused by difference in properties of different switch members, so that illuminating effect of the illuminating device is effectively increased.