A blue-emitting polymer in which a bisindenospirofluorene unit is incorporated in a polyarylene polymer backbone, and an organic EL device using the blue-emitting polymer as a light-emitting material. One example of the blue-emitting polymer may be represented by Formula 1: ##STR00001## where Ar, R.sub.1 through R.sub.14, X.sub.1 and X.sub.2, M and n are defined in the specification. The organic EL device exhibits excellent emission efficiency, low turn-on voltage, good color stability and color purity.

 
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