Introduction: This study was conducted to investigate the effectiveness of couples coping skills enhancement on quality of marital relationship in distressed couples.Method: The research method was quasi experimental with pre-test and post-test design with a control group. The population of the study includes every couple referred to the Health Room Centers in two zones in Tehran. The sample consisted of 12 couple's randomly selected based on convenience and placed randomly in experimental and control group;each group comprised 6 couples. The experimental group received 8 sessions of couples coping skills enhancement training, while the control group did not receive any intervention. Dyadic Adjustment Scale (DAS) was used as pre-test and post-test measurement and obtained data was entered into SPSS16 software. Mean, standard deviation, chi-square, and covariance analysis were used for analyzing the data.Results: The results of covariance analysis showed that the experimental group was significantly higher in marital relationship quality than the control group.Conclusion: Couples coping skills training program in decreasing marital distress and enhancing marital relationship quality is effective.