In this research, we examined actors' and partners' perceptions of each other's attachment insecurities and the associations of these perceptions with relationship satisfaction. A sample of 148 heterosexual couples completed measures of self and partner attachment insecurities and relationship satisfaction. Results indicate that partners agree in their perceptions of their own and each other's attachment insecurities (anxiety and avoidance). Based on the actor–partner interdependence model (APIM), we also found that both actors' scores on avoidance and their perceptions of their partner's degree of avoidanc are associated with lower relationship satisfaction. Finally, we found that the way an actor perceives his or her partner's avoidance plays a mediational role in the association between partner's self‐reported avoidance and actor's relationship satisfaction.