Introduction: There are contradictory findings that support the increase of fluid intake, although it is often recommended for the prevention of constipation. It was aimed to evaluate the relationship between defecation habits and water consumption among the interns of a medical school in this study. Material and Method: This was a descriptive research and the data were collected through a web-based questionnaire. The statistical analyses were performed using distribution measure for continuous variables and chi-square test for categorical variables by means of the SPSS program. Findings: 50,5% of the participants were women and their average age was 23,4 years. Of the participants, 55,4% stated that they paid attention to water consumption and 50,2% were determined to consume more than two litres of water per day. According to the Roman III criteria, 31,1% of the participants were found to have chronic constipation. Conclusion: It was found that there is no statistically significant relationship between constipation and water consumption. However, an important finding was that water consumption among 49,8% of the participants was less than 2 litres per day. Therefore, training and arrangements that would increase the water consumption of the students in the areas where they are located should be performed.