Spectral, photoluminescent (PL), and electroluminescent (EL) properties of thin films of M-440 merocyanine dye have been studied. The technique of making EL structures based on this dye is developed. Uniform yellow emission of a, thin. film of M-440 dye is observed at the direct bias voltage that corresponds to the injection part of current-voltage (C-V) characteristics (10-30 V). The effect of a preparation technology on, the structure and spectral characteristics of thin. films of M-440 merocyanine dye has been investigated. For the first time the spectra of emission, caused by the recombination of injected charge carriers of the EL structure are measured for M-440 merocyanine dye.