Objectives are to explore: 1. the effect of the attitudes of senior citizens participating in sports tourism on their behavior intention; 2. the effect of the subjectivenorm of senior citizens participating in sports tourism on their behavior intention; 3. the effect of the perceived behavioral control of senior citizens participating in sports tourism on their behavior intention. Methodology: A questionnaire survey was adopted with 250 senior citizens as respondents. A Theory of Planned Behavior scale was used, in which there are four dimensions for factors: Attitude, Subjective Norm, Perceived Behavioral Control, and Behavioral Intention, in 17 items. Result: 1. Attitude has a significant effect on behavioral intention; 2. subjective norm has a significant effect on behavioral intention; and 3. perceived behavioral control has a significant effect on behavioral intention.