This study investigated legal environments on customers' experiences of accidential losses in a restaurant service. A wide review of the cases showed that restaurant customers' experiences of accidential losses are classified into 11 types as follows; loss of personal belongings with posted warning, loss of personal longings without posted warning, injuries in a restaurant with posted warning, injuries in a restaurant without posted warning, injuries while eating, food poisoning, injuries from defective tablewares, allergic reactions, illegal or unsanitary food supplies, and false labeling of countries of origin. The results of this exploratory study revealed that the respondents had experienced some out of those 11 incidents in average 2.6 times in all of their restaurant visits, and the incidents frequently happened in independent restaurants rather than in fast-food establishments, family restaurants, or hotel restaurants. The results also showed that the accidents from illegal or unsanitary food supplies was happened most frequently and false labeling of countries of origin was mostly anticipated increasing in the future.