This study informs us what has influence on a decision that a customer using a hotel restaurant makes on a menu. Also, you can know how long it takes to decide what they are going to eat, how prompt and different they are. When the customers order food, they are getting very careful about their decisions. According to the study results, sometimes they are influenced by the person whom they accompany with. The most important factors to make customers choose one dish from a wide range of menu are taste of food, food sanitation, price, freshness of food materials. An atmosphere of a restaurant or its reputation, service of employees are key factors, too. You need change to reflect desire of a customer, and problems of a restaurant must be checked thoroughly. Many different kinds of food must be developed and managed thoroughly.