The thesis discusses and analyses the success of natural regeneration on six cable crane lines of about 10 years of age in the beech mountain forests. The routes are located at Vojsko and in the northern part of Trnovski gozd. The thesis compares the success of regeneration between the lines on southern and northern slopes and between different microsites within the lines. On each individual line, 45 plots with the surface area of 2.25 m2 were placed. Beside the density, mixture and the coverage of the regeneration, the thesis also analyses the height growth of the dominant seedlings and the degree of damage caused to the regeneration. An attempt was made to establish which are the main limiting factors that negatively affect the growth of the regeneration. Some advantages and disadvantages of the cable crane skidding are defined as well as the means to decrease the damage to the regeneration and the forest ground. The density of the regeneration of economically important tree species were almost twice as high on the northern line. Regeneration has generally been more successful on the with northern aspect, due to greater proportion of seedlings in higher height clasess, greater seedling coverage and better survival capability. Transversely looking, the regeneration was most successful in the central part, partially less successful on the eastern and least successful on the western side. Regarding the longitudinal section, there were minor differences in the density of seedlings; a bit better regenerated were the middle and the lower parts of the cable crane lines.