Main purpose of this research is to determine whether there is significant correlation between parents' understanding of guidance and educational and vocational matutity level of children of the parents. In order to achieve this aim two comparisons were implementent. One of them was the comparison of vocational maturity level of the children attending high scool of parents whose understanding of guidance is high, average and low. Second,is to determine whether there is a significant differantiation between the understandings of guidance of parents whose children attending high schools with various success levels or not. The research was carried out on high scool students attending last grate at three high scools in 2000-2001 educational year, in Erzurum and on the parents of these students. The Inventory of Understanding of Guidance was applied to the parents and Vocational Maturity Scale was applied to the students.