The main purpose of the current research is to examine whether perceived partner responsiveness has a mediating role in the relationship between the level of self-disclosure and subjective well-being in the context of romantic relationships. In this context, the sample of this study consisted of 226 participants; 159 women and 67 men, who were between 18-33 and currently in any type of romantic relationship. The data collected by "Level of Self-Disclosure in Romantic Relationship Scale (LSDRR)", "The Satisfaction with Life Scale (SWLS)", "Positive and Negative Affect Scale (PANAS)", "Perceived Partner Responsiveness Scale (PPRS)" and Demographic Information Form. Mediation analyzes were tested with four different models. Results revealed that the level of self-disclosure (openness, communication, and affection) to the romantic partner positively affected one’s subjective well-being through perceived partner responsiveness. In other words, it was shown the mediational role of perceived partner responsiveness on the associations between level of self-disclosure and subjective well-being in romantic relationships. It is thought that the results of the present study will contribute to the intervention programs to be carried out to understand and strengthen the relationship dynamics that will contribute to the subjective well-being of the individual in the concept of romantic relationships. Keywords: Level of self-disclosure, subjective well-being, perceived partner responsiveness