The purpose of this study is to identify participation constraints on tourists` attitude toward marine tourism. Data were collected from 199 tourists who visited Jeju Island, from 16 to 22 May, 2012. Collected data were statistically analyzed using SPSS. 17.0. For the analysis method, frequency analysis, factor analysis and regression analysis were conducted. The results can be summarized as follows. First, five factors for participation constraints were extracted such as ``internal``, ``personal``, ``structural``, ``safe``, and ``economical``. Second, three factors for the tourist attitude were extracted such as ``cognitive``, ``emotional``, and ``behavioral``. Third, ``safe & structural constraint`` negatively affected the cognitive attitude. ``Internal constraint`` negatively affected the emotional attitude, and lastly ``safe & internal constraint`` negatively affected the behavioral attitude. Findings from this study suggest that local government and marine tourism business consider the participation constraints with priority when establishing the marine tourism development policy.