Cognition and beliefs about a romantic partner have a central role in determining and directing emotional and physical reactions between partners. Meanwhile, in the field of romantic relationship cognition, roles of ideal standards and cognitive bias are not yet fully clarified. The creation of positive illusions and tendency of controlling partner’s actions represent strategies for coping with discrepancy between ideal standards and objective characteristics of a partner. On the other hand, the acceptance of negative partner characteristics and behavior, without the need to change them, represents another, more effective coping strategy. Partner acceptance is largely based upon consciousness of one's own emotional reactions that are brought into the relationship. Therefore, as a relatively new and yet not fully researched construct, mindfulness might hold a significant role in the field of relationship cognition. The aim of this research is to clarify the connection between mindfulness and constructs of relationship cognition in regard with relationship satisfaction. Analyses are conducted on an individual and dyad level. Research included 212 heterosexual couples who were together for not less than six months. Based upon conducted regression analyses, significant contribution of relationship cognition constructs in explaining the overall variance of relationship satisfaction, has been found. However, significance of predictors differed depending on participants' gender. The actor partner interdependence model for the effects of mindfulness on relationship satisfaction resulted in confirmation of only women actor effect. Relationship satisfaction of both partners shares approximately 21% of common variance. Current model explains only 6% of total dyad interdependence.