Аннотация:The NGC 4151 optical spectra obtained with the TV scanner of the 6-meter telescope in 1986-1990 are presented. The 4060-4860 Å spectral range was observed. The dispersion was 0.5 \divide 2 Å/channel. The characteristic signal-to-noise ratio in individual spectra was S/N = 10 \divide 25. Spectra averaged through periods 2.5 months show changes of asymmetry of the He II 4686 Å broad emission line with a characteristic timescale 2 years.