Physical changes occur in postpartum mothers such as changes in the uterus, lochia, vagina, and vulva. During the puerperium, the uterus will gradually recover to its pre-pregnancy state. One way to make the uterus return to good condition is to perform postpartum care, namely by cupping with the postnatal cupping massage technique. This technique is done by doing massage using cupping on the meridian point area of the abdomen and back. The purpose of this study is to determine the effectiveness of cupping massage in postpartum women on the length of the uterine involution process. This research is a quantitative research using the Quasy-experimental design using the posttest with control design to compare subjects after being given intervention. The research conducted by the researchers was to test the effectiveness of giving cupping massage to the optimization of uterine involution in Demak. Respondents in this study were 3-6 weeks postpartum mothers. The sample size in this study was 30 respondents with 15 respondents in the intervention group and 15 respondents in the control group. In the intervention group, 3-6 weeks postpartum mothers will be given cupping message according to the postpartum visit period. Meanwhile, in the control group, mothers will do postpartum care without massage cupping therapy. Post-test (after intervention) was performed by measuring TFU (weight, diameter, and palpation). Research results obtained p=0.003(p<0.005) that means the provision of cupping massage is effective in the process of uterine involution in Demak.