The purpose of this study was to investigate the impact of adolescent's behavioral deviation on physical self-concept and leisure participation patterns as well as the correlation among physical self-concept, leisure participation patterns, and deviant behaviors. This study applied convenience sampling to sample a total of 484 students, ranging from junior high school students to college undergraduates, engaged in billiard activities in Maoli City. "Physical Self-Concept Scale", "Leisure Participation Patterns Scale", and "Self-stated Deviant Behaviors Scale" were adopted as measuring tools. One-way ANOVA and product-moment correlation were employed to analyze the collected data. The study results showed: (1) the high deviation group had higher "confidence in physical fitness" than the low deviation group; the high deviation group and mid deviation group had a significant higher value in the construct of "appearance confidence" than the low deviation group. (2) In the constructs of "recreational leisure activity" and "sportive leisure activity", the high deviation group had higher participation than the mid deviation and low deviation groups; the mid deviation group also had significant higher participation than the low deviation group in the construct of "recreational leisure activity". (3) As to the correlation test, deviant behavior is positively correlated to confidence in physical fitness, appearance confidence, recreational leisure activity, and sportive leisure activity. People with higher confidence in their physical fitness showed higher confidence in their appearances and would participate more in sportive leisure activities. Finally, suggestions were proposed as a reference for parents, school teachers, and future studies.