Nonattendance is permanent process which is active or passive in some periods of time. This social problem needs systematic solution and includes education, social, juridical security and many other actions of different institutions. Nonattendance of school may be related to bad behaviour in the classroom, not attending lessons and even crime. The social surrounding of children is differentiated according to sex. Sex is one of the most important differentiate features its background of identity and experience. Scientists say that there is a great difference between girls and boys psychology so the nonattendance of both sex should be researched separately. The researches done in 2003 shows that the boys have more problems in learning, staying calm at the lessons and keep close contacts with teachers. The main problems for girls in studies are kept by not clear explanation of the subject. In conclusion we may say that needs and attitudes of boys and girls in studies are different so it is important to make clear nonattendance reasons by researching students sex differences. While doing researches of many different data it wasn��t noticed so many information about children sex differences. The aim of this paper work is to clear the reasons which determine nonattendance between girls and boys. The subject of the research is no attending school risk group students of the 4th – 10th of secondary and main schools. The aim of the research is to research the sex differences of risk... [to full text]