The domination of non-typical (right-hemispherial and bihemispherial) lateralization of auditory-speech functions was found during longitudinal researches of the 13- and 14-years-old adolescents from one Moscow school class. The right hemisphere domination in speech is linked with the development of the conceptional thinking and is considered as the special age feature of children, which is characteristic of their puberty period of the ontogenesis.