Breast cancer arises as a result of abnormal cells forming in the breast at an uncontrolled and irregular rate. There are several types of treatment for breast cancer patients and one of them is chemotherapy. The frequency of chemotherapy can cause several effects that can worsen the patient's functional status. Functional status is an ability to perform daily tasks that include work, self-care, and maintenance of family or social roles. This study aims to identify ADL compliance in breast cancer patients undergoing chemotherapy. This study used a descriptive design, the sample was taken using a non-probability sampling method, namely accidental sampling and the instrument used was a questionnaire compiled using a Likert scale. The reliability test of this study used a Cronbach Alpha of 0.917. Data collection was carried out from September 2015 to August 2016. The description of ADL fulfillment of breast cancer patients undergoing chemotherapy was described to determine the frequency and percentage. The results showed that the fulfillment of ADL in breast cancer patients undergoing chemotherapy was independent (20 people, 54.1%), partial dependence (10 people, 27%), and total dependence (7 people, 18.9%). It can be concluded that most breast cancer patients undergoing chemotherapy can carry out their Activity Daily Living with an independent level of ability. The description of ADL fulfillment of breast cancer patients undergoing chemotherapy is described to determine the frequency and percentage. The results showed that the fulfillment of ADL in breast cancer patients undergoing chemotherapy was independent (20 people, 54.1%), partial dependence (10 people, 27%), and total dependence (7 people, 18.9%). It can be concluded that most breast cancer patients undergoing chemotherapy can carry out their Activity Daily Living with an independent level of ability. The description of ADL fulfillment of breast cancer patients undergoing chemotherapy is described to determine the frequency and percentage. The results showed that the fulfillment of ADL in breast cancer patients undergoing chemotherapy was independent (20 people, 54.1%), partial dependence (10 people, 27%), and total dependence (7 people, 18.9%). It can be concluded that most breast cancer patients undergoing chemotherapy can carry out their Activity Daily Living with an independent level of ability.