Aim: This study was conducted to determine the relationship between pregnant women's spiritual well-being levels and their pregnancy-related stress. Material and Methods: The sample of the descriptive and correlational study consisted of 250 pregnant women aged 18 years and over with the 12th week of pregnancy and above who were admitted to the Obstetrics and Gynecology outpatient clinic of a Training and Research Hospital between November 2020 and April 2021 and who agreed to participate in the study. The data were obtained by collecting the Personal Information Form, Spiritual Well-Being Scale (SWBS), and Tilburg Pregnancy Distress Scale (TPDS). The SPSS statistical program was used to evaluate the data. Results: The mean age of the pregnant women was 26.5±5.3 years. It was determined that 39.6% of the pregnant women were secondary school graduates, 72% had planned pregnancies, 31.6% were primiparous and 60% were in the third trimester. A statistically significant, negative, and weak relationship was found between the spiritual well-being levels of pregnant women and pregnancy-related stress (r=-0.33, p=0.000). Conclusion: In this study, the spiritual well-being of pregnant women was determined to be high, and pregnancy-related stress was found to be low. However, it was found that as the spiritual well-being of pregnant women increased, their pregnancy-related stress decreased.