This study examines a relation between quality of a high-school and a delinquent tendency of the high-school students. Following hypotheses were examined. 1. In Japan there is a great difference in behavioural patterns and value orientations of students depending upon ranks of theh high-schools. It is tihs difference that actuany creates diffrences in problematic behaviour patterns of high-school students. 2. Prevailing delinquent culture in low-ranked high-schools fastens the delinquent tendendency of the students. Data of a survey project on high-school students in which I participated, were analysed for the study. The flowing results were obtained. 1. Many students of low-ranked high-schools do not tend to adapt themselves to thier school circumstance and they are not satisfied with educational policies of their schools. They are not interested in their school life. Instead, they enjoy themselves rather out of their schools. 2. The youth culture in which many students of low-ranked high-schools are interested are "game center" "motorcycles" "coffee shops" "drinkinhg" and so on. On the contrary, many students of high-ranked high-schools are interested ih "literature and philosophy" "traveling alone" and so on. 3. Classfication of inclination to youth culture by a multivariable analysis showed that students of low-ranked high-schools have an inclination to delinquent youth culture and that they are indifferent to the quest of their identity. The present entrance system of high-schools, in which students are selected automatically by accomplishment of junior high-schools, trigger many problems in the formation of delinquent youth culture. Therefore, it is required to improve the entrance system to high-schools.