An investigation of the time consumed in daily life duties and the diets of senior high school students living in cities was carried out to clarify the actual condition of the nutrient intake of growing students and also the relationship between the caloric intake and calories expended. It was concluded: 1) Both the coloric intake and the calories expended were higher in male students, and a great difference between boys and girls was found. The difference was larger as compared with the case of pupils infants shown in the previous report. 2) From the time study of daily life duties no difference in calories expended between boys and girls could be found in hours for sleeping and study at school. Girls needed plenty of time in helping work at home and dressing, and the boys for sportsclub at school. Therefore, the expenditure of boys was higher. 3) Comparing the caloric intake and clories expended both boys and girls consumed more energy in the afternoon. As the result, the importance of food quality, especially in lunch was shown.