Facebook jealousy is for now unexplored research area, therefore the aim of this study was to examine gender differences in Facebook jealousy, and determine relationship between personal characteristics, relationship characteristics, characteristics of Facebook usage and Facebook jealousy. This research was conducted among 470 students from different universities in Croatia. We used The Facebook Jealousy Scale, Modified Inventory Of Experiences In Close Relationships, Relationship Assessment Scale, Facebook Intensity Scale, SNS Use For Profile Maintenance And Grooming along with sociodemographic data of participants. According to the results, the difference between men and women in the intensity of Facebook jealousy is not significant, however hierarchical regression analysis conducted separately for men and women has shown that there are differences in the structure of predictors associated with Facebook jealousy. Among men 46% of Facebook jealousy variance has been explained based on one significant predictor – anxious attachment, while amog women there were three significant predictors – anxious attachment, relationship satisfaction and Facebook use for grooming which have explained 30% of Facebook jealousy variance.