Although romantic relationships are a source of satisfaction in life, they can also be a source of unpleasant emotions such as jealousy. Given that jealousy can result in many negative behavioral and emotional outcomes, it is important to identify different types of jealousy and their connections to important factors like relationship satisfaction and self-esteem. Namely, self-esteem is partially developed through social interactions by evaluations of significant others, like for example romantic partners. The aim of this research was to expand knowlegde about the relationship between jealousy, relationship satisfaction and selfesteem. There was in total 147 participants from Republic of Croatia in this research, in the age range between 18 and 41. Instruments used in this research included a questionnare of general data, Multidimensional scale of jealosy (Pfeiffer i Wong, 1989), translated to croatian by Kalebić and others (2000), Scale of marriage satisfaction (Ćubela Adorić i Jurević, 2006) and adapted version of Revisited Self-Liking and Self-Competence Scale (Tafarodi i Swann, 2001), translated by Nekić and others (2016) as a part of their research. The results showed there was no significant correlation between jealousy and relationship satisfaction. Furthermore, it was concluded that there was a significant negative correlation between global jealousy and self-esteem and a significant negative correlation between subtypes of cognitive and emotional jealousy with self-esteem. Therefore, the participants who had higer levels of global jealousy and a higher tendency toward cognitive and emotional jealousy also had lower levels of self-esteem. However, there was no significant correlation between bihevioral jealousy and self-esteem. Finally, the results showed that there was no significant correlation between relationship satisfaction and self-esteem. Established relations are partially in concordance with some previous research in this area. Therefore, these results show the need to search foward and try to answer the present problems more specifically, by using a more representative sample and by questionning both partners, in order the gain a clearer picture about the relations between jealousy, relationship satisfaction and self-esteem.