Lidar observations of the vertical ozone distribution in the atmosphere over Tomsk are analyzed. The observations were conducted in summer 1998. The lidar setup is described. Lidar return signals were corrected for miscounts due to pile up of single-electron pulses at signal recording in the photon-counting mode. The ozone profile was averaged over the three summer months. This profile is indicative of the ozone deficit of 20–25 % in the area of maximum ozone layer as compared with the Krueger model. The highest variability of the ozone content has been noticed in the lower part of the layer at altitudes of 15 to 16 km. As the altitude further increases, the variability decreases monotonically. Data obtained in lidar measurements were used for calculation of the ozone column in the 15–30 km layer. Comparing time series of data on the ozone column measured with М–124 ozonometer and the integral column ozone, we have found the correlation coefficient К = 0.47. The ozone percentage in the 15–30 km layer has been found to be (61.6 ± 5.6) %. The vertical profile of the coefficient of correlation between the ozone concentration and temperature has been drawn. The correlation proved to be positive in the 16–26 and 28–32 km altitude ranges. The altitude ranges of 15 to 16 and 27 to 28 km are characterized by negative correlation. It is remarkable that secondary ozone maxima may arise just in these altitude ranges. These maxima are most likely related to the horizontal advection of polar air masses and the meridional circulation of the stratosphere.