We present here some results of lidar studies of the aerosol vertical distribution in the stratosphere, obtained in 1994. These results are a part of a long-term series of observations. The results obtained show that the aerosol content in the stratosphere, polluted in 1991 by volcanic products of Pinatubo eruption, is now approaching its background level. A qualitative assessment of the aerosol particle size–distribution in the stratosphere is carried out based on the results of two-frequency laser sounding at 532 and 1064 nm wavelengths.