The purpose of the study is to explore the differences in academic pressure, social support and well-being among athletic class students in Taichung municipal high schools and to get the results for further studies. Questionnaire survey and purpose sampling are adopted in this study. The participants are from the first to the third grades students in athletic class from senior high schools in Taichung City. A questionnaire is created based on the functions of "academic pressure", "social support", and "well-being" by the researcher and is used as the research tool. 500 questionnaires were distributed and 454 were returned. The valid rate of questionnaire is 90.8%. The results are stated as following: High school athletic class students' academic pressure is significantly related to social support. Well-being can be predicted by personal and interpersonal factors of academic pressure. Well-being can also be predicted by peer and teacher supports in social support. In conclusion, the academic pressure and social support is significant correlation, and the academic pressure and social support will affect the well-being.