Progress in science and technology as well as developments in sports and physical education;especially after World War II; let the problems to be seen as a scientific phenomenon. On theother hand; increase of student body efficiencies has been an important objective in universitiesand especially in physical education departments. According to the importance of moreknowledge about physical fitness conditions of people; this study was carried out to compareand find the relationships of body composition and physical fitness in Male and female studentsof Isfahan University of Technology.Descriptive method was used in this research and researchsample of 500 female and male students in physical fitness classes were randomly selectedamong students of all statistical population; then Ayfrd test; fat under the skin; and BMI testusing an advanced caliber were done. To analyze the findings; descriptive statistics andinferential statistics including Pearson correlation test (R) and test (T) in independent groupswere used.The findings of this study indicate that body composition between physical fitness tests with thematerial relations are different and only some of the factors as follows: There is a significantrelationship between pull–ups and students body weight with r= -0/417 and between pull–upsand students relative fat with r= -0/519 with p<o/o1 obtained was also observed that theaverage student test records obtained from the average level of total male and total fitnesscondition is not good; but compared with their female students significantly ( p=0/000) havemore favorable performance; female students except sit and reach test and fitness of thesestudents is poorly estimated. And 79 percent fat under the skin of female students in "high" and"too high” is. And percentage of fat under their skin significantly (p=0/000) is more than malestudents.The results of this research indicate that variables such as weight; body composition; and fatpercent had significant contribution on the estimation of physical fitness items. The data showsthat fitness status of students is desirable and this is more acute in the case of female students.The high percentage of fat under the skin of students shows the lack of physical activity whichcan be a health threatening parameter. Therefore it seems necessary to plan and motivatestudents in order to encourage them to exercise and to provide adequate facilities andappropriate promotions which can result in higher physical preparation and physical fitness.