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Introduction: The importance of students' research is obvious to the authorities of medical education and research affairs. It is important to address the performance of students and their related factors during education. The aim of this research was to determine the behavioral styles of students in Shiraz University of medical science in academic environments. Materials & Methods: For the cross sectional study, 400 students of second semester of 2005-2006 academic year were selected in Shiraz University of medical science by random sampling method. The data were collected using a questionnaire and analyzed by SPSS software and Chi-square test. Findings: Results of the study demon-trated that the interest in scientific research among the students shown to be as poor (19%),moderate (38.75%) and good (42.25%) reectively. Interest in partic-pating in scientific and educational works-ops was also graded as poor (15.75%), modrate (42.80) and good (41.25%), resp-ctively. There was a significant relationship between education level and educational failure.(P<0.05) Discussion & Conclusion: Findings of the study indicated that paying attention to the effective factors on academic success of medical students is essential and authorities should improve the quality of education and students' acceptance, alleviate the problems of students' facilities and occupation and enhance the educational interests.