This study aims to use the theory of planned behavior to verify undergraduates' behavioral intentions regarding their participation in aquatic sports. Undergraduates in Taiwan serve as the research subjects and a survey method employs questionnaires. A total of 200 valid questionnaires were received out of 230, thus giving a valid response rate of 86.9%. The information was analyzed with AMOS 19.0. The research results show that: First, attitudes do not have a significant influence on the behavioral intentions; Second, subjective norms do not have a significant influence on the behavioral intentions; and Third, perceived behavior control has a significant influence on the behavioral intentions. It is expected that the results of this study can serve as reference for strategies and measures to promote aquatic sports in universities as well as agencies in the aquatic sports industry in Taiwan.