Previous studies have investigated interdependence of the associations between predictors and negative psychological outcomes in dyads of cancer patients and family caregivers. This study examined the dyadic effects of perceived capability of savouring the moment on psychological well‐being. A total of 152 dyads of cancer patients and caregivers reported their perceived capability of savouring the moment (Savoring Beliefs Inventory), state positive affect (Chinese Affect Scale) and life satisfaction (Satisfaction With Life Scale) within 6 months following diagnosis.