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The major purposes of this study were: (1) To investigate the characteristics of the student subculture, (2) To analyze the general condition of the delinquent behavior, (3) To find the relation between the student subculture and the delinquent behaviors. The study concurrently used both theoretical analysis and questionnaire survey. The samples used in this work were taken from 709 ninth grade students in four junior high schools respectively in Taipei City. An instrument designed by author was conducted: "The Questionnaire of the student subculture and the delinquent behaviors in junior high school". The obtained data were statistically analyzed by T-Test, Pearson Correlation, One-way ANOVA, and multiple regression analysis. The results of the study were as follows: 1. The student subculture (1) Students' learning attitude was satisfactory, but not very good. (2) Students' affect toward school was satisfactory too. (3) Students' personal relationship was good. (4) The behavior of student's peer group was good. 2. The delinquent behaviors Students seldom committed serious delinquent behaviors, but they occasionally broke class regulation when they were in the class. 3. The relationship between the student subculture and the delinquent behaviors. There was a medium and significant relationship between the student sub-culture and the delinquent behaviors. (1) The better learning attitude a student had, the fewer delinquent behaviors he committed. (2) The more affect toward school a student had, the fewer deliquent behaviors he committed. (3) The better personal relationship a student had, the fewer delinquent behaviors he committed. (4) The better a student's peer behaved, the fewer delinquent behaviors the student committed.