This research was conducted with the purpose of providing basic data by analyzing the effects of lifestyles(eating habits and exercising habits) on the physique and strength of elementary school students so that they could live a healthier life. The subjects of the final analysis were 286 students (151 male students, 135 female students) in the 6th grade of elementary school. Based on eating habit scores and exercising habit scores obtained from survey, the top 25 percent of the subjects and the bottom 25 percent of the subjects were divided according to genders for analysis. In order to see if there are differences in physique and physical strength according to lifestyles, measurements of physique(height, weight) and physical strength(50m run, standing long-jump, raising the upper body, sit and reach, long run-walk) were used. The analysis of data was conducted by T-Verification with SPSS/PC +11.0 for Windows at the 5 percent significance level. It turned out that eating habits did not show any significant difference in physique and physical strength between the top and bottom group regardless of genders. Exercising habits showed no differences in physique regardless of genders, but they showed statistically significant differences in physical strength. According to exercising habits, male students showed differences in standing long jump, raising the upper body, long run, and female students showed differences in raising the upper body and long run. Based on these results, it was verified that lifestyles affect the physical strength of elementary school students directly rather than their physique. Therefore, it is thought that guiding elementary school students to have desirable lifestyles could increase the physical strength of elementary school students whose physical strength is getting weaker day by day.