A polymer with an electroluminescent chromophore on a skeletal chain was designed and synthesized. Homogeneous thin films (similar to 100 nm thick) of the polymer were obtained by spin-coating. Two types of electroluminescent diodes were fabricated, with single-layer and double-layer structures : indium tin oxide (ITO)/polymer/MgAg, and ITO/polymer/electron transport layer/MgAg, respectively. Bright green electroluminescence with a peak at 520 nm, which corresponded to the photoluminescence peak of the polymer, was observed in both types of device. The double-layer device was found to have better electroluminescent efficiency than the single-layer device.