Background: Back massage with jasmine oil is the most popular method that nurses can use during labor to reduce pain. It has no side effects for both the mother and the fetus as well as it lessens the need for intrusive pain relief techniques. Objective: This study aims to determine the effect of jasmine oil back massage on pain intensity among primigravidae during the first stage of labor. Materials and Method: A quasi-experimental research design was used at the labor and delivery section of El-Shatby Maternity University Hospital in Alexandria city. A convenient sample of 100 laboring women, who were meeting the inclusion criteria, was recruited. They were assigned equally (50 laboring women) to either the study or the control group. The study group received back massage with jasmine oil, while the control group received routine hospital care. Collection of data lasted 6 months, 3 days/week. Results: Both the study and control groups were matching in almost all of their socio-demographic characteristics and history of current pregnancy, where the relationship between them was not statistically significant. However, high significant reduction of labor pains was noticed in the study group following the intervention and at the end of the active phase of labor, compared to the control group. Conclusion: Lower back massage with jasmine oil during the active phase of the first stage of labor was highly significantly effective in reducing the intensity of labor pains. Recommendations: Non-pharmacologic pain relief methods during labor, including jasmine oil back massage, should be added to nursing curricula and nursing care protocols. Health teaching classes for pregnant women should be conducted to increase their awareness about the effect and benefits of jasmine oil back massage in decreasing labor pain