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.