With the aim of a simplification of the incorporation of layers in an electroluminescent cell, the emission layer (rare earth elements complex), hole conduction layer (such as N-vinylcarbazole), and electron conduction layer (1,10-phenanthroline) can be superposed in one macromolecule. Copolymers 2-methyl-5-phenylpentene-1-dione-3,5 with N-vinylcarbazole in a ratio of 5:95, which contain Pr, Nd, Er, and Eu with 1,10-phenanthroline, were synthesized for the first time. The luminescence spectra of the obtained metallocomplexes and copolymers in solutions, films, and solid state are investigated and analyzed. These polymetallocomplexes can be used as promising materials for organic light-emitting devices.