[en] As a result of a complex quantitative analysis of spectral and photometrical observations of SS 433 carried out during several nights in July and August 1981 with the 6-meter and 60-cm telescopes of the Special Astrophysical Observatory of the USSR Academy of Sciences, considerable rapid variations are shown to exist for the parameters Δλ(1/2), R_c, W_λ and z of the relativistic H_α^- emission line components, the same parameters of the stationary He I⁰ lines λλ 5876, 6678 (except for z), the brightness of the system in the V filter and the color index V-R, at timescales Δt=10^m-35^m (Δ-bart=20^m). From the analysis of photometrical observations of SS 433 in RVB filters in 1979, it follows that rapid variability of the object's brightness ocurred practically with the same timescale. Possible interpretation of the detected variability is considered