Introduction: Study habit is a significant factor associated with academic achievement. The study style of students can influence their learning level. This study was conducted to find out the relationship between study habits and academic achievement among the students participating in the fifth national medical science Olympiad at Kerman University of Medical Sciences in 2013.
Materials and Methodss: This descriptive cross-sectional study was carried out on the students who attended the fifth medical science Olympiad at Kerman University of Medical Sciences in 2013. The sample size comprised of all the study population, selected through census sampling. A total of 278 students participated in the study and completed the questionnaire. Palsane and Sharma Study Habits Inventory (PSSHI) was used to collect the data.  Date were analyzed by t-test, ANOVA and Pearsons’ correlation coefficient.
Results: The mean age of students was 24.94 + 2.36. 40.3% of participants were male and 59.7% were female. 65.5% were medical students, 28.4% were students of paramedical sciences, 2.2% were management students, 3.6% were pharmacy students and 1% dentistry students. The scores of study habit domains included: time division (7 out of 10), physical conditions (2.07 out of 12), reading ability (9.61 out of 16), note taking (3.97 out of 6), learning incentive (8.55 out of 12), memory (4.42 out of 8), exams (11.83 out of 20), health (3.65 out of 6) and total score (56.13 out of 90). The results of independent t-test showed no significant correlation between academic achievement and the scores of study habit domains and total mean score of study habits in both males and females (P=0.47). 
Conclusion: The study results indicated no difference between different study habits and styles among students. However, the study factor greatly affected the achievement level of all the students who used electronic resources.