Harmony between functional occlusion and facial esthetics is very important in orthodontic treatment. Relation between hard and soft – tissue is significant in therapy of mallocclussions and in treatment of the lower third of the face. A soft – tissue analysis of the profile plays an important role in orthodontic treatment, because all disorders are shown on it. Using the assumption that hard and soft – tissues are correlated, we investigated the differences between class I and II/1 within two groups of 12-year-olds boys and girls. The soft tissue profile was analysed by Burstone's B-line and Ricketts's E-line. The horizontal lip position consisted of measuring the distance between tips of the lips and the reference line used. The measured distance was denoted as positive when the lip was ahead of the reference line, as negative when the lip was behind the line, and as zero when the lip was on the line. In the process of the profile analysis, telerentgen was used. Using measured variables statistic analysis showed following conclusions: Angle class I didn't show any differences between females and males; class II/1 showed the differences between females and males; analysing boys between class I and II/1 we may conclude that the differences in the position of upper and lower lip are present; analysing girls between class I and II/1 we may conclude that the differences in the position of upper and lower lip are not present; comparison between classes without sex separation showes differences in the position of upper lip according to Burstone and Ricketts.