Breast milk donation is an alternative solution to help mothers who have difficulty producing breast milk to support exclusive breastfeeding. Donor breast milk is given from mothers who have excess supply of breast milk to babies who need breast milk. Breast milk donation can provide many benefits, but it is undeniable that it will be risky for the baby if it is not handled wisely. The purpose of this study is to determine the donor of ASI (Mother's Milk) at the Lactashare Lowokwaru Foundation, Malang in the perspective of Islamic law. This study used a descriptive qualitative method. The location of this research is at Lactashare Foundation St. Bunga December, Green Sapphire No. 10 Jatimulyo Lowokwaru Malang. Data collection techniques used are observation, interviews, and documentation. The results of the study show that the procedure passes through several steps, namely, mothers who wish to donate their breast milk must register themself through the Lactashare application which can be downloaded via the Google Play Store or contact the contact person directly. Then do a health check and mental examination. The procedure is allowed in the Islamic perspective in that some conditions such as an agreement between both parties (donor and recipient) and the donor are physical and mental health. The procedure applied at the Lactashare Lowokwaru Foundation in Malang is still within the path of Islam and maintains the requirements of Islamic law