This study employs the concept of national character and previously developed approaches for measuring consumer complaint intentions to investigate the relationship between national character and specific guest responses to unsatisfactory hotel service. Data were collected from a sample of Japanese and American guests at relatively high-priced hotels in Taiwan. Significant relationships were found between national character and the type of complaining behavior in which guests intended to engage. American respondents were more likely to stop patronizing the hotel, complain to hotel management, and warn family or friends than Japanese respondents were. Japanese respondents were more likely to take no action in response to unsatisfactory service.