Vengeance is negative structure for interpersonal relationship and personality. Therefore, alternative models should be developed for lessening it. The basic purpose of this study was to examine the probable relationships between forgiveness, positivity, happiness, vengeance in university students. Participants were 330 (167 females, 163 males) university students in Turkey who volunteered to take part in this study. All of the participants were either 22 or 39 years old, with a mean age of 28.65 years. For gathering data, Oxford Happiness Questionnaire-Short Form, Positivity Scale, Trait Forgiveness Scale and Vengeance Scale were used. While analyzing the data, Independent sample t test, Pearson correlation analysis, and Multiple Regression analysis were used. According to the findings, there were statistical significant relationships between forgiveness, positivity, happiness, vengeance. In other words, vengeance had negative links with forgiveness, positivity, happiness. Findings of multiple regression analysis indicated that the increase of forgiveness, positivity, and happiness lead to reduction of vengeance.