Childbirth is one of the most important influencing factors for sexual function. Therefore, this study was conducted with the aim of comparing sexual function in primiparous and multiparous women. This cross-sectional analytical study was performed using systematic random sampling on 420 women in the postpartum period who referred to Bandar Abbas health Centres in 2018. The data were collected using an interview method which consisted of a Female Sexual Function Index questionnaire and a demographic questionnaire. The data analysis was performed using the SPSS Version 23 software. The results showed that sexual dysfunction was lower in multiparous women compared to primiparous women (p = .006). Low sexual activity in primiparous women can be due to less privacy and more time and energy loss. Several factors including housing situation, monthly income, episiotomy incision, and the education level of the couple were influential in the sexual function of the primiparous women (p