Background: Husband involvement in prenatal care is a relatively new concept in developing countries, including Iran. Considering the key role of men in the promotion of women's health, this study aimed to determine the effects of husband involvement in prenatal care on couples' intimacy and postpartum blues in primiparous pregnant women referring to selected comprehensive health centers in Rafsanjan in 2021.Methods: This experimental study was performed on 69 primiparous pregnant women aged 15-45 years with a gestational age of 20-36 weeks. Participants in the intervention group were accompanied by their husbands and received routine prenatal care and virtual training. Participants in the control group received routine prenatal care without husband involvement. The Unidimensional Relationship Closeness Scale (URCS) was completed in two stages, before intervention and two weeks after delivery, and the Stein questionnaire was completed one week after delivery. Data was analyzed with T-test, Chi-square and Fisher exact tests.Results: The results showed that the incidence of postpartum blues was significantly lower in the intervention group than in the control group (p <0.001). The mean score of couples' intimacy after intervention increased in the intervention group and decreased in the control group; however, the difference was not statistically significant (p = 0.08).Conclusion: Husband involvement in prenatal care and virtual training for couples may be effective in controlling postpartum blues and possibly in increasing couples' intimacy.