A family is the first educational institution where a child acquires his basic social standards. A family is also the most important institution for human socialization having a great influence on the development of a child‘s personality. Parents form the biggest part of a child‘s environment the development of a child‘s personality greatly depends on them. The aim of this work is to analyse the typical psychological relation between junior schoolchildren and their mothers on the bases of sex and family status. 400 people (200 children aged 9-11 and their 200 mothers) took part in a survey. 5 questionnaires were used for assessing children‘s psychological feelings, inside calmness, self - assessment, worries about school and motivation for learning. For assessing their mothers‘ psychological feelings, inside calmness and self – assessment 3 questionnaires were used. While carrying out a survey there were given 3 hypotheses which turned to be partly approved. A significant relation was defined between girls‘ inside calmness and their mothers‘ psychological feelings as well as between their self – assessment, whereas the same kind of relation between boys and their mothers was not confirmed. There was also defined a significant relation between boys‘ worries about school and their mothers‘ psychological feelings. A second hypotheses which states that in a two – parent family there is a closer relation between the children‘s inside calmness, psychological mood at school... [to full text]