Most of the breastfeeding mothers have problems with unsmooth breast milk production. The heart of the banana is a plant that has an effect of galactagogue that increases the production of breast milk. The purpose of this study was to determine the impact of giving banana heart to increased levels of prolactin hormone and milk production in postpartum mothers. This is pre-post with control group design. The population was postpartum mothers on days 1-4 were breastfeeding, a sample of 36 respondents. Data analysis used the parametric paired t-test, Wilcoxon, independent t-test, Mann Whitney. In the intervention group, there was a significant increase in prolactin hormone levels (79.31 ± 51.46, p-value 0.000) while the control group decreased (-12.09 ± 72.42, p-value 0.488). Breast milk production based on infant body weight in the intervention group had a significant increase (3058.61 ± 58.40502, p-value 0.040) compared to the control group there was a decrease (-76.3584 ± 54.22032, p-value 0.000). Milk breast production in the intervention group experienced a significant increase (51.8750 ± 6.36356, p-value 0.000) compared to the control group there was a decrease (38.9117 ± 7.58910 p-values 0.000). Banana heart extract is effective against increase prolactin hormone levels in postpartum mothers, p <0.05, which means that there is an effect of consumption of banana heart on prolactin hormone levels and milk breast production.