en تخصصي Special پژوهشي Research <strong>Background</strong>: Although pregnancy and motherhood are enjoyable experiences, they are associated with numerous biopsychological changes requiring adaptation. The present study aimed to assess the effects of relaxing music on life distress and Maternal-Fetal Attachment (MFA) in pregnant women.<br> <strong>Methods</strong>: This was a quasi-experimental study with a pre-test, post-test and a control group design. The research population included all Iranian pregnant women referring to Laleh Hospital in Tehran City, Iran, in 2020. In total, 30 women were selected using the convenience sampling method and randomly assigned into the intervention and control groups (n=15/group). The required data were collected using the Life Distress Inventory (LDI) and the Maternal-Fetal Attachment Scale (MFAS). The intervention group listened to relaxing music for twelve 45-50-minute sessions in the morning and during routine midwifery visits; however, the controls received no intervention. The collected data were analyzed using Multivariate Analysis of Covariance (MANCOVA) in SPSS V. 22.<br> <strong>Results</strong>: The obtained results indicated that the intervention group reported a lower level of life distress in the post-test, compared to the controls (P=0.0001, F=15.860). The intervention group also achieved a higher mean score on MFA, than the control group (P=0.0001, F=35.872).&nbsp;<br> <strong>Conclusion</strong>: According to the present research findings, reproductive health and nursing professionals, and psychologists would recommend music as a complementary therapy to reduce stress and distress experienced by expecting mothers and to improve MFA. Music therapy, Psychological distress, Maternal-fetal relationship, Pregnancy 1 8 http://jccnc.iums.ac.ir/browse.php?a_code=A-10-33-14&slc_lang=en&sid=1 Mona Shokri Shams kia shokri@yahoo.com 10031947532846006197 10031947532846006197 No Department of Counseling, Faculty of Humanities and Social Sciences, Branch of Science and Research, Islamic Azad University, Tehran, Iran. Anahita Khodabakhshi-Koolaee a.khodabakhshid@khatam.ac.ir 10031947532846006198 10031947532846006198 Yes Department of Psychology and Education Sciences, Faculty of Humanities, Khatam University, Tehran, Iran. Mohammad Reza Falsafinejad falsafinejad@yahoo.co.uk 10031947532846006199 10031947532846006199 No Department of Assessment and Measurement, Faculty of Psychology and Educational Sciences, Aallameh Tabataba’i University, Tehran, Iran.