Introduction: Cesarean section is considered essential for protecting both the mother’s and fetus’s health. Nevertheless, in spite of being one of the safest surgical methods, cesarean section is more dangerous for mothers than vaginal delivery. According to WHO’s report, almost 15% of the deliveries can correctly lead to cesarean. However, statistics during the previous decade show a noticeable increase in the rate of cesarean. In many cases, cesarean is not a medical necessity. According to a number of studies, pregnant women prefer not to tolerate the pain that, in turn, leads to the main cause of increasing tendencies to voluntary cesarean. Having KNOWLEDGE about pain reducing methods can, therefore, decrease such tendencies.Materials and Methods: This cross-sectional analytical study was conducted on 390 pregnant women referring to the public health centers of Mashhad. They filled out a questionnaire about personal and obstetric information, the kind of delivery they preferred (vaginal or cesarean), and their KNOWLEDGE about pain relief methods of delivery.Results: The findings show that the study groups, i.e. those participants who favored cesarean and those who preferred vaginal delivery, showed no significant difference in age, education, and job. The main causes of tendency to vaginal delivery were found to be the fear of anesthesia and surgery as well as willingness to see the newborn immediately after giving birth. The fear of vaginal delivery pain and the physician’s diagnosis were the main causes of voluntary cesarean. 80.80% of the participants were not aware of the pain reducing methods of baby delivery.Conclusion: As suggested by the findings, the main reason for having cesarean is the fear of vaginal delivery. However, the findings also suggest that the patients are not sufficiently aware of pain relief methods due to the lack of access to the adequate information being provided by the delivery centers. It seems that raising women’s KNOWLEDGE about delivery pain reducing methods and their benefits can decrease their tendencies to voluntary cesarean.