The purpose of this study is to investigate how the lifestyles of food habits of college students relate to constipation. The results were as follows : 1) All the total respondents were 541 college students. 220 (40.8%) respondents were male and 321 (59.2%) respondents were female. Based on their BMIs, 55.5% of the female respondents were under-weight (BMI < 20), 16.8% of the male respondents were under-weight, as well. These results point out the fact that a high percentage of female college students are under-weight, compared to male of students. 2) Of the respondents, 59.0% reported having 1 or 2 meals per day, but their eating patterns were irregular. Of the respondents, 71.2% preferred white rice with their meals. Of the respondents, 51.2% reported that they skipped breakfast. The main reasons why these respondents skipped breakfast were either that they were in a busy (44.7%), or it was their habit (38.4%). The response that their meals were nutritionally balanced was 34.6%, and the student who thought that their own meal pattern was healthful was 8.0%. 3) This research also focused on body image among female college students, and the results indicate that the majority of female respondents (62.5%) felt that they were overweight (very fatty or fatty) and 90.1% of the female respondents indicated they were interested in dieting (interest or very interest). Most of the students were involved in light or medium activity (94.2%) or no exercise (75.6%). The ratio of those who exercised was everyday only 33.6%. 4) Of the respondents, 48.7% reported that they had difficulty evacuating (every time very difficult, every time difficult and sometimes difficult) and 50.3% of the students reported that their bowel movements were irregular. 5) Of the females, 8.2% and Of the males, 0.5% were regarded as constipated. 6) The life habit factors that influenced constipation were skipping breakfast, the amount of water intake and exercise.