This study aimed to investigate the degree to which the elements of the theory of planned behavior mediate the relationship between constraints and intention to continuing participation in physical activities. The sample of the study consisted of 119 (N=119) older individuals who participated in organized physical activity programs. The results indicated that attitudes and perceived behavioral control were negatively correlated with constraints, whereas the subjective norm variable had no relationship with them. In terms of the mediation role of the elements of the theory of planned behavior, the results indicated that both attitudes and perceived behavioral control partially mediated the relationship between constraints and intention, with the perceived behavioral control variable being the strongest mediator. These findings suggest that the theory of planned behavior elements mediate the constraints-intention relationship and determine, in a large degree, the older individuals' intention to continuing taking part in physical activities.