Purpose: This study aimed to identify the correlations among social support, stress, and practice of prenatal care and elucidate the predictors affecting the practice of prenatal care in married immigrant women in Korea. Method: This study employed a descriptive correlational design with 165 married immigrant women in Korea. Results: Social support and prenatal-care practice were positively correlated, and stress was negatively correlated with both prenatal-care practice and social support. The practice of prenatal care in married immigrant women was most influenced by social support. Conclusion: As such, there is a need for nursing intervention that fosters social support for pregnant immigrant women. Concerted efforts are also required to reduce their stressors. This study could form the basis for developing childbirth management programs for pregnant women who have immigrated to Korea in order to marry.