This study aimed to explore the existing relationships between emotion regulation, relationship satisfaction, and age. The research involved 775 participants: 222 were male (28.6%), and 553 were female (71.4%). Their ages ranged from 18 to 75 years (M = 26.57; SD = 9.55). Respondents completed questionnaires related to difficulties in emotion regulation, relationship satisfaction, and various socio-demographic data. The results of this show that difficulties in emotion regulation are negatively associated with age and relationship satisfaction. Furthermore, our findings shows age moderating the relationship between difficulties in emotion regulation and relationship satisfaction. We explore both theoretical and practical implications, along with ethical considerations associated with this topic.