We have made investigation into the actual conditions how often ordinaty families eat prepared food and dine out. As the result, we have found out that many families, in a certain degree, eat prepared foods and dine out. Because of the development of the food service industry, the ever-increasing participation of women in public affairs, and the leisure-oriented society, we think that the number of families doing home cooking tends to decrease, but not to increase by any means. There are people who eat prepared foods or dine out because they do not know how to cook,or because they do not like to cook. Food is, however, connected closely with health. Therefore, home cooking suitable for each family or each person is essential in the future, too