Background: One problem that mostly happened on postpartum mother is insufficient breastmilk production. Cupping in particular point on the upper back area can reduce some disurbances during puerperium period such as discomfort, muscles tension by the relaxation effect of its. The relax feeling will affect both prolactin and oxytocin as breastmilk production hormones. Therefore, the breastfeeding process runs smoothly. The purpose of this study is to determine the effect of cupping on breastmilk production. Method: This research is an analytical experiment, with Pretest Posttest Control Group Design, using purposive sampling to gather the sample. 10 respondents were divided into intervention group and control group where both breastmilk are measured by monitoring the frequency of baby suckles, the duration of baby suckles, how many times the mother pumps breast milk, how much the breastmilk from pumping, and the total of breastmilk production per day. The results were analyzed using Mann-Whitney Test. Result: The statistical test result found there are an effect before and after cupping therapy was given in the intervention group shown by p value = 0.007 0 is rejected and accept Ha. It is shows that there is a significant effect of cupping therapy on increasing breastmilk production. Conclusion: There is an effect of cupping therapy on breastmilk production in the intervention group at Darus Syifa clinic Sultan Agung Islamic Hospital Semarang proven by the p value = 0.007 <0.05.