The aim of this research was to examine the role of different humor styles in romantic relationships, with a particular focus on how partners' humor styles predict perceived romantic relationship quality and efficacy of relationship conflict resolution. Additionally, the research aimed to determine how the match in dominant humor styles within a romantic couple contributes to relationship quality and efficacy of relationship conflict resolution. The study involved 112 heterosexual romantic couples who are not married, meaning there were 112 male participants and 112 female participants. The average age of the male participants is 24.95 years (SD=5.00), while the average age of the female participants is 23.51 years (SD=4.12). The results were processed using hierarchical regression analysis and multivariate analysis of variance (MANOVA). The results showed that the self-enhancing humor style is a significant positive predictor of relationship quality, but only when used by men. In other words, greater use of the self-enhancing humor style by men contributes to higher perceived relationship quality. The results also showed that the aggressive humor style is a statistically significant negative predictor of relationship quality and efficacy of relationship conflict resolution when used by men, but not by women. That is, when men use aggressive humor more, the relationship will be perceived as lower in quality and efficacy of relationship conflict resolution will be lower. Furthermore, self-defeating humor was found to be a significant negative predictor of efficacy of relationship conflict resolution when used by women, but not by men. More precisely, greater use of the self-defeating humor style by women contributes to lower efficacy of relationship conflict resolution. Finally, the results showed that there is no statistically significant difference in relationship quality and conflict resolution success between romantic couples where partners match in dominant humor styles and couples where partners do not match.