This study examines the psychometric properties of the Russian-version of G. Spanier’s Dyadic Adjustment Scale (DAS). 302 subjects (84 couples) participated in this research and each partner responded individually to the PFB or to both scales. The results of the exploratory factor analysis revealed a three-factor structure of the scale, which was endorsed by the means of confirmatory factor analysis. Three subscales and total score revealed appropriate reliability — internal consistency and split reliability. The construct validity was confirmed by correlations between DAS subscales and other instruments testing theoretically close constructs. External validity was confirmed by correlations between DAS subscales and perfectionism which shows that mentally focusing on one’s imperfections and failures is negatively related to subjective well-being in a marriage.