Two types of conjugated polymer, poly(MEHPV-co-BPV)s and poly (MEHPV-alt-BPV). were synthesized by dehydrohalogenation and Honer-Emmons condensation, respectively. Single layer type light-emitting diodes were fabricated utilizing synthesized polymers and their electro-optical properties were examined. Emission spectrum of poly (MEHPV-co-BPV)s had two peaks in the blue and orange region which originated from BPV and MEHPV moiety, respectively. This may be due to the mixture of two homopolymers or the macroblock nature of the BPV and MEHPV unit in the pr,ly(MEHPV-co-BPV)s. However, LED made from poly(MEHPV-alt-BPV) showed a relatively sharp single peak at the yellow-green region due to the alternating nature of the repeat units.