Abstract
 This research aims to delve into the impact of Endorphin massage in alleviating back pain among expectant mothers in the final stages of pregnancy residing in the charming Cemorokandang Village, located in the lively Kedungkandang Subdistrict of Malang City, East Java. To conduct this study, a distinctive pre-experimental approach was adopted, employing a one-group pretest-posttest design. The target population encompassed a remarkable count of 33 individuals, specifically pregnant women experiencing the joys and challenges of the third trimester in Cemorokandang Village, Kedungkandang Subdistrict. Selecting a unique approach, 18 pregnant women were carefully chosen as the research sample through consecutive sampling. The focal point of the investigation revolved around the independent variable of Endorphin massage, while attentively examining the dependent variable of back pain experienced by pregnant women during the transformative third trimester. The data collection instruments utilized in this study encompassed questionnaires, standard operating procedure (SOP) sheets, and the FacePainScale-Revised (FPS-R) assessment sheet. The Wilcoxon Matched-Pairs Test was employed for data analysis, unveiling its secrets and unraveling the hidden patterns within. The findings of the research revealed that prior to receiving Endorphin massage, the majority of respondents experienced pain levels exceeding 10 (55.6%), whereas the lowest reported pain level was categorized as very painful, as reported by two respondents (11.1%). After receiving Endorphin massage, the data illustrated that the largest proportion of respondents reported no pain (50.0%), while the fewest reported slightly painful sensations (22.2%). The application of the Wilcoxon Matched-Pairs Test for statistical analysis resulted in an incredibly low p-value of 0.000. This remarkable finding supports the alternative hypothesis, demonstrating a high level of statistical significance at the α (0.05) significance level, thus confirming its acceptance. In conclusion, this study confirms that Endorphin massage significantly influences back pain experienced by pregnant women in the third trimester in Cemorokandang Village, Kedungkandang Subdistrict. As a recommendation, the researcher suggests utilizing this thesis as a point of reference for future researchers, as it can positively contribute to subsequent research endeavors.
 Keywords: Endorphin Massage, Back Pain, Third Trimester Pregnant Women