The purpose of this study was to explore the factors that were considered by the tourists who decided to take the shuttle bus in Yangmingshan National Park. By reviewing the literature, this research examined possible efffects of riding choice behavior from attention to the attributes of the shuttle bus. In the survey, the data were collected and analyzed by Chi-square test, t-test, and discriminant analysis. The results are summarized as follows:"Whether the bus goes through the destination or not" is the only attribute of shuttle bus which affect tourist's riding behavior. The result of discriminant analysis indicates that "whether enough information about the shuttle bus are offered," "whether it stops anywhere and anytime," "whether the bus goes through the destination" and "how long it would take to wait for the bus" are important attributes for predicting tourists' willingness to take shuttle bus.