The influence of dietary environment on the nutritional awareness, eating habits and appreciation of school lunch services were studied by a questionnaire investigation conducted on 172 students in the first to third grades of three junior high schools in Yamanashi Prefecture. The students were classified into three groups from the results of a cluster analysis of the questionnaire answers; group 3 had high awareness of the effects of diet and eating family dinner together on health and socializing, group 1 had unhealthy nutritional awareness and eating habits, and group 2 had doubtful nutritional awareness and eating habits. A significant relationship was found between the nutritional awareness, eating habits and eating environment of the three groups. Five factors were extracted from the appreciation of the school lunch service by the factor analysis: factor I, palatability; factor II, nutrition and socializing; factor III, dietary education; factor IV, school lunch information to the home; factor V, school lunch environment. The scores by group 1 for the five factors were negative and the lowest among the three groups. The nutritional awareness and eating habits were found to be closely related to the appreciation of the school lunch service.