For the 184 first and second grade students at Shimane Medical University, we investigated the following items: the time they get up in the mornings, eating, smoking and drinking habits, the time assigned for studying, reading and extra-curricular activities. Among the first grade students, males who got up an hour before coming to school accounted for 26.1 % of the total, while the figure for female students was 70.6 %, the greatest percentage. For second grade students, the figure for males decreased to 25.9 % while that for females decreased to 48.2 %. The degree of decline of the latter was judged to be high. Students who ate no breakfast accounted for 28.9 % of the first grade male students, increasing to 41.9 % of the second grade male students. For females, the corresponding figures were 5.8 % in the first grade, increasing dramatically to 27.6 % of the second grade students. For male students, those who considered the quantity of their breakfast to be sufficient for their needs (when compared to the quantity of lunch) accounted for 12.3 %, the corresponding figure for females was 30.5 %. As the grade advances, the quantity of breakfast was inclined to decrease. Data concerning defecation revealed that first grade males who responded once a day or irregular accounted for 84.2%, in contrast to 47.2% of the females. Regarding those who take supper between 19.00 and 20.00 hours, the figure for first grade males was 43.1% and females 29.4%. Between 20.00 and 21.00 hours the figures changed to 32.9 % and 35.3 % respectively. On the other hand, the percentage of second grade males eating between 19.00 and 20.00 hours increased to 50.0 % and that of females to 55.2 %. Bedtime was reported as follows: 46.1 % of first grade males and 58.8 % of females retired between 1.00 and 2.00 am the latter being the highest percentage. Among second grade males, the number who retire between 2.00 and 3.00 am increased from 25.0% to 37.1% and for the females, the increase was from 11.8% to 34.5%. Those who suffered from headaches or stomachaches without having any physical illness increased slightly in number from 21.5% of the first grade students to 36.3 % of the second grade.