According to the 2012 IDHS, it was noted that prolonged labor by 38.2% was the main cause of maternal and perinatal death, followed by bleeding 35.26% and eclampsia 16.44%. Prolonged parturition can result in an emergency for both mother and baby. In mothers it can cause bleeding, shock and death, while in infants it can cause fetal distress, asphyxia and caput. One of the efforts to prevent prolonged labor is to use the Rebozo Relaxation Technique which supports labor so that it can run physiologically. The purpose of this study was to determine the effect of rebozo relaxation on the length of labor in Primipara mothers. This type of research uses a Quasi Experimental Design research design with a Non-Equivalent Control Group research design. The sample in this study was 40 respondents divided by 20 people in the control group and 20 in the experimental group. Data collection using T-Test and Mann Whitney Test. The results of the study obtained p value (0.00) <α (0.005). With a frequency of 4-8 times and a duration of 20-45 minutes with an intensity of 85%-95%, the total length of labor in the experimental group averaged 334.50 minutes (5.57 hours) and the non-experimental group averaged 478, 75 minutes (7.79 hours). Suggestion for applying Rebozo Relaxation to Mothers of Inpartum Primigravida Stage I Active Phase to prevent prolonged labor and reduce oxytocin injection for primigravida.