SDKI (2012) noted that 38.2% of prolonged labor is a maternal and perinatal cause of death. Efforts to prevent prolonged childbirth such as pelvic rocking with birth balls that support labor to run physiologically. This   study   aims   to   determine   the   effect   of   pelvic   rocking implementation with birth ball on the progress of childbirth in women giving birth at the Tanjung Pratama Clinic of Deli Tua in 2018. This study uses pre-experimental research using static group comparison design with accidental sampling technique. The sample was divided into 2 groups, the intervention group conducted pelvic rocking with birth ball for mothers during the active phase for 30 minutes as much as 2 sessions and observed the progress of labor in the control group conducted in April-July 2018. Data analysis using the independent samples test. The results show there was an influence of pelvic rocking with birth ball to the progress of labor where the average progress of labor for the birth ball status was done and was not done was different from the p-value of 0.00001 <0.05. Birth ball status was 138.2 minutes faster than birth ball status was not performed. Pelvic rocking with birth ball helps the baby to rotate to the optimal position and shorten the first stage of labor so as to reduce pain and provide comfort to the mother in the face of childbirth. It is expected that health workers can become facilitators for maternal mothers and support labor in a physiological way.