A blue-light emitting compound having fluorene side chains and an organic electroluminescence (EL) device adopting the blue-light emitting compound as a color developing substance. The blue-light emitting compound with fluorene side chains has the formula (1) ##STR1## The compound having the formula (1) hereinabove, as a blue light-emitting substance, is useful as a color developing substance for a display device with improved emission efficiency. The organic EL device adopts the compound having the formula (1) for its organic layer, for example, the emitter layer, which results in improved emission efficiency and luminance, compared to common blue light-emitting compounds.