The aim of this study was to examine the effect of attachment styles on perfectionism in romantic relationships among university students. 136 university students participated in this study. The data collection tools were “Perfectionism in Romantic Relationships Scale” and “Relationships Scale”. The ANOVA analysis system was used to define the differences, if any, in points related to the participants’ and their partners’ gender, birth-sequence, the state of their relationships, and attachment. A correlation analysis to with age was carried out to determine differences, if any, to do with age and a t-test analysis was used to determine differences, if any, to do with gender. The findings showed that there was no difference in terms of gender in both perfectionism type scores. In addition, while there were no differences in self-perfectionism scores according to their birth-sequence, there are reasonable differences when romantic relationships are at stake. A post-hoc study showed that these differences are seen among the participants with no past experience, but have newly started a relationship. When points related to a partner’s perfectionism is considered, it is seen that there are no differences to do with birth-sequence and romantic relationships. A negative correlation, at a reasonable level, has been seen between age and partner-oriented perfectionism. Finally, there seemed no differences between self-perfectionism and partner’s perfectionism points in attachment styles.